Overview

Comprehensive Description

The blue crab Callinectes ornatus is a decapod crustacean in the Portunidae family. It is a strong and agile swimmer powered by a pair of flat, oar shaped rear legs called swimmerets. Swimmerets allow C. ornatus to rapidly swim backwards, sideways, and sometimes forward (Barnes 1980). The color of this species varies considerably. Adult males have a carapace that is uniformly olive to dark brown with a large orange spot posteriorly that can appear round to blotchy (Gore and Grizzle 1974, Gore 1977, Williams 1984). There are distinct ivory white tips on all the spines on the front of the carapace (Gore 1977). Juveniles are not as brilliantly colored appearing olive-yellow to greenish. The length and curvature of the reproductive organs (gonopods) are distinctive in mature males for each of the Callinectes species (Gore 1977, Barnes 1980) See illustrations from Williams (1974) below.
  • Barnes RD. 1980. Invertebrate Zoology. Saunders College/Holt, Rinehart and Winston, Philadelphia, PA. 725 p.
  • Branco JO, Lunardon-Branco MJ, Verani JR, Schveitzer R, F. Souto FX, and WG Vale. 2002. Natural diets of Callinectes ornatus Ordway, 1963 (Decapoda, Portunidae) in the Itapocoroy inlet, Pehna, SC, Brazil. Braz. Arch. Biological Technology 45:35-40
  • Gore RH. 1977. Studies on decapod crustaceans from the Indian River region of Florida.A field character for the rapid identification of the swimming crabs Callinectes ornatus Ordway, 1963 and C. similis Williams, 1966 (Brachyura: Portunidae). Northeast Gulf Science 1:119-123.
  • Gore RH and RE Grizzle. 1974. Studies of the decapod crustacean from the Indian River Lagoon region of Florida.Callinectes bocourti A. Milne Edwars, 1979 (Decapoda, Portunidae) from the central east coast of Florida. Crustaceana 27:306-308.
  • Negreiros-Fransozo ML, Mantelatto FLM, and A Fransozo. 1999. Population biology of Callinectes ornatus Ordway, 1863 (Decapoda, Portunidae) from Ubatuba (SP), Brazil. Scientia Marina 63:157-163.
  • Norse EA. 1978. An experimental gradient analysis: hyposalinity as an "upstress" distributional determinant for Caribbean portunid crabs. Biological Bulletin 155:586-598.
  • SCDNR. Undated. Blue Crabs of the South Atlantic Bight. Adobe pdf document available online.
  • Williams AB. 1974. The swimming crabs of the genus Callinectes (Decapoda: Portunidae). Fishery Bulletin 72:685-798.
  • Williams AB. 1984. Shrimps, Lobsters, and Crabs of the Atlantic Coast of the Eastern United States, Maine to Florida. Smithsonian Institution Press, Washington DC. 550 p.
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Source: Indian River Lagoon Species Inventory

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Distribution

Bermuda; Virginia, North and South Carolina through Southern Florida; northwestern Yucatan to Estado de Sao Paulo, Brazil.
  • North-West Atlantic Ocean species (NWARMS)
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Callinectes ornatus is distributed from North Carolina to Rio Grande de Sul, Brazil (Williams 1984, Branco et. al. 2002) living at depths of up to 75 meters on sand and mud bottoms (Branco et al. 2002). The ornate blue crab is found in river mouths but more commonly occurs offshore (Negreiros-Fransozo et al. 1999). Juveniles are usually found in shallower habitats. Adults and juvenile of the ornate blue crab are common in seagrass beds in the lagoon (Gore 1977).
  • Barnes RD. 1980. Invertebrate Zoology. Saunders College/Holt, Rinehart and Winston, Philadelphia, PA. 725 p.
  • Branco JO, Lunardon-Branco MJ, Verani JR, Schveitzer R, F. Souto FX, and WG Vale. 2002. Natural diets of Callinectes ornatus Ordway, 1963 (Decapoda, Portunidae) in the Itapocoroy inlet, Pehna, SC, Brazil. Braz. Arch. Biological Technology 45:35-40
  • Gore RH. 1977. Studies on decapod crustaceans from the Indian River region of Florida.A field character for the rapid identification of the swimming crabs Callinectes ornatus Ordway, 1963 and C. similis Williams, 1966 (Brachyura: Portunidae). Northeast Gulf Science 1:119-123.
  • Gore RH and RE Grizzle. 1974. Studies of the decapod crustacean from the Indian River Lagoon region of Florida.Callinectes bocourti A. Milne Edwars, 1979 (Decapoda, Portunidae) from the central east coast of Florida. Crustaceana 27:306-308.
  • Negreiros-Fransozo ML, Mantelatto FLM, and A Fransozo. 1999. Population biology of Callinectes ornatus Ordway, 1863 (Decapoda, Portunidae) from Ubatuba (SP), Brazil. Scientia Marina 63:157-163.
  • Norse EA. 1978. An experimental gradient analysis: hyposalinity as an "upstress" distributional determinant for Caribbean portunid crabs. Biological Bulletin 155:586-598.
  • SCDNR. Undated. Blue Crabs of the South Atlantic Bight. Adobe pdf document available online.
  • Williams AB. 1974. The swimming crabs of the genus Callinectes (Decapoda: Portunidae). Fishery Bulletin 72:685-798.
  • Williams AB. 1984. Shrimps, Lobsters, and Crabs of the Atlantic Coast of the Eastern United States, Maine to Florida. Smithsonian Institution Press, Washington DC. 550 p.
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Source: Indian River Lagoon Species Inventory

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Physical Description

Size

Male Callinectes ornatus are usually slightly larger than the females measuring up to 60 mm while the female carapace can measure up to 58 mm (Williams 1984). It is unknown whether males and females have different mortality rates (Negreiros-Fransozo et al. 1999).
  • Barnes RD. 1980. Invertebrate Zoology. Saunders College/Holt, Rinehart and Winston, Philadelphia, PA. 725 p.
  • Branco JO, Lunardon-Branco MJ, Verani JR, Schveitzer R, F. Souto FX, and WG Vale. 2002. Natural diets of Callinectes ornatus Ordway, 1963 (Decapoda, Portunidae) in the Itapocoroy inlet, Pehna, SC, Brazil. Braz. Arch. Biological Technology 45:35-40
  • Gore RH. 1977. Studies on decapod crustaceans from the Indian River region of Florida.A field character for the rapid identification of the swimming crabs Callinectes ornatus Ordway, 1963 and C. similis Williams, 1966 (Brachyura: Portunidae). Northeast Gulf Science 1:119-123.
  • Gore RH and RE Grizzle. 1974. Studies of the decapod crustacean from the Indian River Lagoon region of Florida.Callinectes bocourti A. Milne Edwars, 1979 (Decapoda, Portunidae) from the central east coast of Florida. Crustaceana 27:306-308.
  • Negreiros-Fransozo ML, Mantelatto FLM, and A Fransozo. 1999. Population biology of Callinectes ornatus Ordway, 1863 (Decapoda, Portunidae) from Ubatuba (SP), Brazil. Scientia Marina 63:157-163.
  • Norse EA. 1978. An experimental gradient analysis: hyposalinity as an "upstress" distributional determinant for Caribbean portunid crabs. Biological Bulletin 155:586-598.
  • SCDNR. Undated. Blue Crabs of the South Atlantic Bight. Adobe pdf document available online.
  • Williams AB. 1974. The swimming crabs of the genus Callinectes (Decapoda: Portunidae). Fishery Bulletin 72:685-798.
  • Williams AB. 1984. Shrimps, Lobsters, and Crabs of the Atlantic Coast of the Eastern United States, Maine to Florida. Smithsonian Institution Press, Washington DC. 550 p.
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© Smithsonian Marine Station at Fort Pierce

Source: Indian River Lagoon Species Inventory

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Look Alikes

It can be difficult to distinguish the juveniles, immature males, and adult females of C. ornatus from C. danae and C. similis (Williams 1984). C. ornatus is very similar to C. similis and the two were confused until the 1960's (Gore 1977).C. similis can be distinguished from C. ornatus by the pale translucent blue dactyls of the swimming legs and the propodi that are olive on the ends and banded with translucent blue mesially.
  • Barnes RD. 1980. Invertebrate Zoology. Saunders College/Holt, Rinehart and Winston, Philadelphia, PA. 725 p.
  • Branco JO, Lunardon-Branco MJ, Verani JR, Schveitzer R, F. Souto FX, and WG Vale. 2002. Natural diets of Callinectes ornatus Ordway, 1963 (Decapoda, Portunidae) in the Itapocoroy inlet, Pehna, SC, Brazil. Braz. Arch. Biological Technology 45:35-40
  • Gore RH. 1977. Studies on decapod crustaceans from the Indian River region of Florida.A field character for the rapid identification of the swimming crabs Callinectes ornatus Ordway, 1963 and C. similis Williams, 1966 (Brachyura: Portunidae). Northeast Gulf Science 1:119-123.
  • Gore RH and RE Grizzle. 1974. Studies of the decapod crustacean from the Indian River Lagoon region of Florida.Callinectes bocourti A. Milne Edwars, 1979 (Decapoda, Portunidae) from the central east coast of Florida. Crustaceana 27:306-308.
  • Negreiros-Fransozo ML, Mantelatto FLM, and A Fransozo. 1999. Population biology of Callinectes ornatus Ordway, 1863 (Decapoda, Portunidae) from Ubatuba (SP), Brazil. Scientia Marina 63:157-163.
  • Norse EA. 1978. An experimental gradient analysis: hyposalinity as an "upstress" distributional determinant for Caribbean portunid crabs. Biological Bulletin 155:586-598.
  • SCDNR. Undated. Blue Crabs of the South Atlantic Bight. Adobe pdf document available online.
  • Williams AB. 1974. The swimming crabs of the genus Callinectes (Decapoda: Portunidae). Fishery Bulletin 72:685-798.
  • Williams AB. 1984. Shrimps, Lobsters, and Crabs of the Atlantic Coast of the Eastern United States, Maine to Florida. Smithsonian Institution Press, Washington DC. 550 p.
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© Smithsonian Marine Station at Fort Pierce

Source: Indian River Lagoon Species Inventory

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Ecology

Habitat

Depth range based on 217 specimens in 1 taxon.
Water temperature and chemistry ranges based on 66 samples.

Environmental ranges
  Depth range (m): 0 - 18
  Temperature range (°C): 21.296 - 25.874
  Nitrate (umol/L): 0.289 - 0.748
  Salinity (PPS): 34.083 - 36.038
  Oxygen (ml/l): 4.671 - 5.180
  Phosphate (umol/l): 0.106 - 0.241
  Silicate (umol/l): 0.756 - 2.493

Graphical representation

Depth range (m): 0 - 18

Temperature range (°C): 21.296 - 25.874

Nitrate (umol/L): 0.289 - 0.748

Salinity (PPS): 34.083 - 36.038

Oxygen (ml/l): 4.671 - 5.180

Phosphate (umol/l): 0.106 - 0.241

Silicate (umol/l): 0.756 - 2.493
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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Trophic Strategy

Callinectes ornatus is both a saprophagous species, feeding on decaying matter, as well as an active predator. C. ornatus will dig into the substratum in search of food, feeding on mollusks, especially bivalves, and other crustaceans, including brachyura (true crabs), other species of Callinectes, algae, polychaetes, echinoderms, and foraminifera (Branco et al. 2002). Competitors: Competitors of the ornate blue crab are other crustaceans, in particular C. sapidus and C. similis.
  • Barnes RD. 1980. Invertebrate Zoology. Saunders College/Holt, Rinehart and Winston, Philadelphia, PA. 725 p.
  • Branco JO, Lunardon-Branco MJ, Verani JR, Schveitzer R, F. Souto FX, and WG Vale. 2002. Natural diets of Callinectes ornatus Ordway, 1963 (Decapoda, Portunidae) in the Itapocoroy inlet, Pehna, SC, Brazil. Braz. Arch. Biological Technology 45:35-40
  • Gore RH. 1977. Studies on decapod crustaceans from the Indian River region of Florida.A field character for the rapid identification of the swimming crabs Callinectes ornatus Ordway, 1963 and C. similis Williams, 1966 (Brachyura: Portunidae). Northeast Gulf Science 1:119-123.
  • Gore RH and RE Grizzle. 1974. Studies of the decapod crustacean from the Indian River Lagoon region of Florida.Callinectes bocourti A. Milne Edwars, 1979 (Decapoda, Portunidae) from the central east coast of Florida. Crustaceana 27:306-308.
  • Negreiros-Fransozo ML, Mantelatto FLM, and A Fransozo. 1999. Population biology of Callinectes ornatus Ordway, 1863 (Decapoda, Portunidae) from Ubatuba (SP), Brazil. Scientia Marina 63:157-163.
  • Norse EA. 1978. An experimental gradient analysis: hyposalinity as an "upstress" distributional determinant for Caribbean portunid crabs. Biological Bulletin 155:586-598.
  • SCDNR. Undated. Blue Crabs of the South Atlantic Bight. Adobe pdf document available online.
  • Williams AB. 1974. The swimming crabs of the genus Callinectes (Decapoda: Portunidae). Fishery Bulletin 72:685-798.
  • Williams AB. 1984. Shrimps, Lobsters, and Crabs of the Atlantic Coast of the Eastern United States, Maine to Florida. Smithsonian Institution Press, Washington DC. 550 p.
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Source: Indian River Lagoon Species Inventory

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Population Biology

The ornate blue crab is common in the Indian River Lagoon and shallow tropical habitats of warm waters in the eastern Atlantic oceans. In a population of Callinectes ornatus from Ubatuba in Brazil, the males made up 63% of the population outnumbering the females 1.7 to 1 (Negreiros-Fransozo et al. 1999).
  • Barnes RD. 1980. Invertebrate Zoology. Saunders College/Holt, Rinehart and Winston, Philadelphia, PA. 725 p.
  • Branco JO, Lunardon-Branco MJ, Verani JR, Schveitzer R, F. Souto FX, and WG Vale. 2002. Natural diets of Callinectes ornatus Ordway, 1963 (Decapoda, Portunidae) in the Itapocoroy inlet, Pehna, SC, Brazil. Braz. Arch. Biological Technology 45:35-40
  • Gore RH. 1977. Studies on decapod crustaceans from the Indian River region of Florida.A field character for the rapid identification of the swimming crabs Callinectes ornatus Ordway, 1963 and C. similis Williams, 1966 (Brachyura: Portunidae). Northeast Gulf Science 1:119-123.
  • Gore RH and RE Grizzle. 1974. Studies of the decapod crustacean from the Indian River Lagoon region of Florida.Callinectes bocourti A. Milne Edwars, 1979 (Decapoda, Portunidae) from the central east coast of Florida. Crustaceana 27:306-308.
  • Negreiros-Fransozo ML, Mantelatto FLM, and A Fransozo. 1999. Population biology of Callinectes ornatus Ordway, 1863 (Decapoda, Portunidae) from Ubatuba (SP), Brazil. Scientia Marina 63:157-163.
  • Norse EA. 1978. An experimental gradient analysis: hyposalinity as an "upstress" distributional determinant for Caribbean portunid crabs. Biological Bulletin 155:586-598.
  • SCDNR. Undated. Blue Crabs of the South Atlantic Bight. Adobe pdf document available online.
  • Williams AB. 1974. The swimming crabs of the genus Callinectes (Decapoda: Portunidae). Fishery Bulletin 72:685-798.
  • Williams AB. 1984. Shrimps, Lobsters, and Crabs of the Atlantic Coast of the Eastern United States, Maine to Florida. Smithsonian Institution Press, Washington DC. 550 p.
Creative Commons Attribution Non Commercial Share Alike 3.0 (CC BY-NC-SA 3.0)

© Smithsonian Marine Station at Fort Pierce

Source: Indian River Lagoon Species Inventory

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Life History and Behavior

Reproduction

Records of museum collections of oviparous females suggest that Callinectes ornatus spawn year-round (Williams 1984). Adult females move offshore to find temperature and/or salinity conditions that are best for spawning. One female can mate with several males during the same reproductive period (Negreiros-Fransozo et al. 1999).
  • Barnes RD. 1980. Invertebrate Zoology. Saunders College/Holt, Rinehart and Winston, Philadelphia, PA. 725 p.
  • Branco JO, Lunardon-Branco MJ, Verani JR, Schveitzer R, F. Souto FX, and WG Vale. 2002. Natural diets of Callinectes ornatus Ordway, 1963 (Decapoda, Portunidae) in the Itapocoroy inlet, Pehna, SC, Brazil. Braz. Arch. Biological Technology 45:35-40
  • Gore RH. 1977. Studies on decapod crustaceans from the Indian River region of Florida.A field character for the rapid identification of the swimming crabs Callinectes ornatus Ordway, 1963 and C. similis Williams, 1966 (Brachyura: Portunidae). Northeast Gulf Science 1:119-123.
  • Gore RH and RE Grizzle. 1974. Studies of the decapod crustacean from the Indian River Lagoon region of Florida.Callinectes bocourti A. Milne Edwars, 1979 (Decapoda, Portunidae) from the central east coast of Florida. Crustaceana 27:306-308.
  • Negreiros-Fransozo ML, Mantelatto FLM, and A Fransozo. 1999. Population biology of Callinectes ornatus Ordway, 1863 (Decapoda, Portunidae) from Ubatuba (SP), Brazil. Scientia Marina 63:157-163.
  • Norse EA. 1978. An experimental gradient analysis: hyposalinity as an "upstress" distributional determinant for Caribbean portunid crabs. Biological Bulletin 155:586-598.
  • SCDNR. Undated. Blue Crabs of the South Atlantic Bight. Adobe pdf document available online.
  • Williams AB. 1974. The swimming crabs of the genus Callinectes (Decapoda: Portunidae). Fishery Bulletin 72:685-798.
  • Williams AB. 1984. Shrimps, Lobsters, and Crabs of the Atlantic Coast of the Eastern United States, Maine to Florida. Smithsonian Institution Press, Washington DC. 550 p.
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Source: Indian River Lagoon Species Inventory

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Growth

In the Portunidae, there are generally 7 zoeal stages and 1 postlarval, or megalopal stage. Occasionally an eighth zoeal stage is observed. Larval release usually occurs at high tide assuring larval abundance is at its peak during the ebbing tide. Crab larvae are advected offshore, and complete development in the coastal shelf waters. The typical time for development through the 7 zoeal stages is between 30-50 days before metamorphosis to the megalopal stage. The megalop is capable of postponing metamorphosis to first crab and may persist from 6-58 days. It is widely believed that the megalopal stage subsequently returns to the estuaries for settlement, and recruitment to adult populations.
  • Barnes RD. 1980. Invertebrate Zoology. Saunders College/Holt, Rinehart and Winston, Philadelphia, PA. 725 p.
  • Branco JO, Lunardon-Branco MJ, Verani JR, Schveitzer R, F. Souto FX, and WG Vale. 2002. Natural diets of Callinectes ornatus Ordway, 1963 (Decapoda, Portunidae) in the Itapocoroy inlet, Pehna, SC, Brazil. Braz. Arch. Biological Technology 45:35-40
  • Gore RH. 1977. Studies on decapod crustaceans from the Indian River region of Florida.A field character for the rapid identification of the swimming crabs Callinectes ornatus Ordway, 1963 and C. similis Williams, 1966 (Brachyura: Portunidae). Northeast Gulf Science 1:119-123.
  • Gore RH and RE Grizzle. 1974. Studies of the decapod crustacean from the Indian River Lagoon region of Florida.Callinectes bocourti A. Milne Edwars, 1979 (Decapoda, Portunidae) from the central east coast of Florida. Crustaceana 27:306-308.
  • Negreiros-Fransozo ML, Mantelatto FLM, and A Fransozo. 1999. Population biology of Callinectes ornatus Ordway, 1863 (Decapoda, Portunidae) from Ubatuba (SP), Brazil. Scientia Marina 63:157-163.
  • Norse EA. 1978. An experimental gradient analysis: hyposalinity as an "upstress" distributional determinant for Caribbean portunid crabs. Biological Bulletin 155:586-598.
  • SCDNR. Undated. Blue Crabs of the South Atlantic Bight. Adobe pdf document available online.
  • Williams AB. 1974. The swimming crabs of the genus Callinectes (Decapoda: Portunidae). Fishery Bulletin 72:685-798.
  • Williams AB. 1984. Shrimps, Lobsters, and Crabs of the Atlantic Coast of the Eastern United States, Maine to Florida. Smithsonian Institution Press, Washington DC. 550 p.
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Source: Indian River Lagoon Species Inventory

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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Callinectes ornatus

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 2
Species With Barcodes: 1
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Conservation

Threats

Because Callinectes ornatus occupies the same habitats as the commercial species, C. sapidus, it is impacted by the crab fishery along western Atlantic coast.
  • Barnes RD. 1980. Invertebrate Zoology. Saunders College/Holt, Rinehart and Winston, Philadelphia, PA. 725 p.
  • Branco JO, Lunardon-Branco MJ, Verani JR, Schveitzer R, F. Souto FX, and WG Vale. 2002. Natural diets of Callinectes ornatus Ordway, 1963 (Decapoda, Portunidae) in the Itapocoroy inlet, Pehna, SC, Brazil. Braz. Arch. Biological Technology 45:35-40
  • Gore RH. 1977. Studies on decapod crustaceans from the Indian River region of Florida.A field character for the rapid identification of the swimming crabs Callinectes ornatus Ordway, 1963 and C. similis Williams, 1966 (Brachyura: Portunidae). Northeast Gulf Science 1:119-123.
  • Gore RH and RE Grizzle. 1974. Studies of the decapod crustacean from the Indian River Lagoon region of Florida.Callinectes bocourti A. Milne Edwars, 1979 (Decapoda, Portunidae) from the central east coast of Florida. Crustaceana 27:306-308.
  • Negreiros-Fransozo ML, Mantelatto FLM, and A Fransozo. 1999. Population biology of Callinectes ornatus Ordway, 1863 (Decapoda, Portunidae) from Ubatuba (SP), Brazil. Scientia Marina 63:157-163.
  • Norse EA. 1978. An experimental gradient analysis: hyposalinity as an "upstress" distributional determinant for Caribbean portunid crabs. Biological Bulletin 155:586-598.
  • SCDNR. Undated. Blue Crabs of the South Atlantic Bight. Adobe pdf document available online.
  • Williams AB. 1974. The swimming crabs of the genus Callinectes (Decapoda: Portunidae). Fishery Bulletin 72:685-798.
  • Williams AB. 1984. Shrimps, Lobsters, and Crabs of the Atlantic Coast of the Eastern United States, Maine to Florida. Smithsonian Institution Press, Washington DC. 550 p.
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Relevance to Humans and Ecosystems

Benefits

In the Ubatuba region of Brazil it is a major fishery (Negreiros-Fransozo et al. 1999).
  • Barnes RD. 1980. Invertebrate Zoology. Saunders College/Holt, Rinehart and Winston, Philadelphia, PA. 725 p.
  • Branco JO, Lunardon-Branco MJ, Verani JR, Schveitzer R, F. Souto FX, and WG Vale. 2002. Natural diets of Callinectes ornatus Ordway, 1963 (Decapoda, Portunidae) in the Itapocoroy inlet, Pehna, SC, Brazil. Braz. Arch. Biological Technology 45:35-40
  • Gore RH. 1977. Studies on decapod crustaceans from the Indian River region of Florida.A field character for the rapid identification of the swimming crabs Callinectes ornatus Ordway, 1963 and C. similis Williams, 1966 (Brachyura: Portunidae). Northeast Gulf Science 1:119-123.
  • Gore RH and RE Grizzle. 1974. Studies of the decapod crustacean from the Indian River Lagoon region of Florida.Callinectes bocourti A. Milne Edwars, 1979 (Decapoda, Portunidae) from the central east coast of Florida. Crustaceana 27:306-308.
  • Negreiros-Fransozo ML, Mantelatto FLM, and A Fransozo. 1999. Population biology of Callinectes ornatus Ordway, 1863 (Decapoda, Portunidae) from Ubatuba (SP), Brazil. Scientia Marina 63:157-163.
  • Norse EA. 1978. An experimental gradient analysis: hyposalinity as an "upstress" distributional determinant for Caribbean portunid crabs. Biological Bulletin 155:586-598.
  • SCDNR. Undated. Blue Crabs of the South Atlantic Bight. Adobe pdf document available online.
  • Williams AB. 1974. The swimming crabs of the genus Callinectes (Decapoda: Portunidae). Fishery Bulletin 72:685-798.
  • Williams AB. 1984. Shrimps, Lobsters, and Crabs of the Atlantic Coast of the Eastern United States, Maine to Florida. Smithsonian Institution Press, Washington DC. 550 p.
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Source: Indian River Lagoon Species Inventory

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Wikipedia

Callinectes ornatus

Callinectes ornatus is a species of swimming crab in the genus Callinectes. It can be distinguished from the closely related Atlantic blue crab (Callinectes sapidus) by the presence of six frontal teeth on the carapace, compared with only four for C. sapidus.[2] C. ornatus is also smaller, at a maximum carapace width of only 93 millimetres (3.7 in), compared to 230 mm (9.1 in) in C. sapidus, and is therefore not commercially exploited.[2]

Their shells are light yellow-brown to red-brown in color. The lower tips of the claws are blue. The two spikes on each side of their shells are not as long as in blue crabs. They can be found in the western Atlantic Ocean, as well the Caribbean coastlines. Their diet consists of small crustaceans and small fish. They are also scavengers.

References[edit]

  1. ^ "Callinectes ornatus". Integrated Taxonomic Information System. Retrieved October 27, 2010. 
  2. ^ a b Susan B. Rothschild (2004). "Sandy beaches". Beachcomber's Guide to Gulf Coast Marine Life: Texas, Louisiana, Mississippi, Alabama, and Florida (3rd ed.). Taylor Trade Publications. pp. 21–38. ISBN 978-1-58979-061-2. 

Further reading[edit]


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