Overview

Comprehensive Description

Biology

Inhabits shoals, reefs and lagoons in 0-28 m (Ref. 90102).
  • Winterbottom, R. 2001 Two new gobiid fish species in Trimma and Trimmatom (Teleostei: Gobiidae) from the Indian and Western Pacific Oceans. J. Ichthyol. Aqua. Biol. 5(1):19-24. (Ref. 52310)
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Distribution

Indo-West Pacific.
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Indo-West Pacific: Seychelles, Cargados Carajos, Chagos Archipelago to Sumatra and the Philippines, north to Japan, south to Papua New Guinea, the Solomon Islands, and the Timor Sea.
  • Winterbottom, R. 2001 Two new gobiid fish species in Trimma and Trimmatom (Teleostei: Gobiidae) from the Indian and Western Pacific Oceans. J. Ichthyol. Aqua. Biol. 5(1):19-24. (Ref. 52310)
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Physical Description

Morphology

Dorsal spines (total): 6; Dorsal soft rays (total): 9; Analsoft rays: 9
  • Winterbottom, R. 2001 Two new gobiid fish species in Trimma and Trimmatom (Teleostei: Gobiidae) from the Indian and Western Pacific Oceans. J. Ichthyol. Aqua. Biol. 5(1):19-24. (Ref. 52310)
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Size

Max. size

2.2 cm TL (male/unsexed; (Ref. 90102))
  • Allen, G.R. and M.V. Erdmann 2012 Reef fishes of the East Indies. Perth, Australia: Universitiy of Hawai'i Press, Volumes I-III. Tropical Reef Research. (Ref. 90102)
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Diagnostic Description

Trimmatom pharus differs from T. nanus, T. offucius, and T. sagma in possessing scales on the body (vs naked) and branched pelvic fin rays (vs unbranched). Trimmatom zapotes, T. macropodus, and T. pharus all have body scales but T. zapotes has unbranched pelvic fin rays, and T. macropodus has the first four pelvic fin rays branched. Trimmatom pharus shares many meristic characteristics with T. eviotops including the presence of body scales and the branching of the first four pelvic fin rays; the two species do, however, differ in details of colour pattern. In preserved specimens the first body bar on T. eviotops crosses the pectoral base and the extends over the dorsum, passing backwards to the dorsal fin. In Trimmatom pharus the body bar which crosses the pectoral base crosses the dorsal surface anterior to the dorsal fin. Trimmatom eviotops has a broad dark saddle on the dorsall half of the caudal peduncle, while Trimmatom pharus has a narrow body bar or small dark saddle (Ref. 52310).
  • Winterbottom, R. 2001 Two new gobiid fish species in Trimma and Trimmatom (Teleostei: Gobiidae) from the Indian and Western Pacific Oceans. J. Ichthyol. Aqua. Biol. 5(1):19-24. (Ref. 52310)
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Type Information

Paratype for Trimmatom pharus Winterbottom
Catalog Number: USNM 261264
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Collector(s): H. Fehlmann & C. Rhyne
Year Collected: 1967
Locality: Chagos Archipelago, Diego Garcia Atoll, edge of Spur Reef ca. 300m. SE of Middle Island., Diego Garcia Atoll, Chagos Archipelago, British Indian Ocean Territory, Indian
Depth (m): 1 to 2
  • Paratype: Winterbottom, R. 2001. Aqua: Journal of Ichthyology and Aquatic Biology. 5 (1): 22, fig. 3.
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Paratype for Trimmatom pharus Winterbottom
Catalog Number: USNM 293531
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Collector(s): V. Springer, T. Fraser & C. Smith
Year Collected: 1976
Locality: Off northern tip of St Brandon's Shoals (contiguous portion)., Cargados Carajos Shoals (Saint Brandon Rocks), Mauritius, Mascarene Islands, Indian
Depth (m): 6 to 11
  • Paratype: Winterbottom, R. 2001. Aqua: Journal of Ichthyology and Aquatic Biology. 5 (1): 22, fig. 3.
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Paratype for Trimmatom pharus Winterbottom
Catalog Number: USNM 263555
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Collector(s): V. Springer, T. Fraser, C. Smith & et al.
Year Collected: 1976
Locality: St. Brandon's Shoals just northeast of Siren Island., Siren Island, Cargados Carajos Shoals (Saint Brandon Rocks), Mauritius, Mascarene Islands, Indian
Depth (m): 17 to 21
  • Paratype: Winterbottom, R. 2001. Aqua: Journal of Ichthyology and Aquatic Biology. 5 (1): 22, fig. 3.
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Paratype for Trimmatom pharus Winterbottom
Catalog Number: USNM 263558
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Collector(s): V. Springer, T. Fraser, C. Smith & et al.
Year Collected: 1976
Locality: St Brandon's Shoals: Off northwest shore Albatross Island,, Albatross Island, Cargados Carajos Shoals (Saint Brandon Rocks), Mauritius, Mascarene Islands, Indian
Depth (m): 18
  • Paratype: Winterbottom, R. 2001. Aqua: Journal of Ichthyology and Aquatic Biology. 5 (1): 22, fig. 3.
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Paratype for Trimmatom pharus Winterbottom
Catalog Number: USNM 293530
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Collector(s): J. Bohlke, D. Dockins, W. Rosenblatt & et al.
Year Collected: 1964
Locality: Amirantes Islands: African Islands; SE of South Island (Adm. Ch. 724)., African Banks, Amirante Islands, Seychelles, Indian
Depth (m): 5
  • Paratype: Winterbottom, R. 2001. Aqua: Journal of Ichthyology and Aquatic Biology. 5 (1): 22, fig. 3.
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Paratype for Trimmatom pharus Winterbottom
Catalog Number: USNM 293526
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Collector(s): J. Bohlke & et al.
Year Collected: 1964
Locality: Mahe Vicinity: Inner Edge of Reef (Where the Seas Break) Just N of Anonyme Island (Adm. Ch. 1072)., Mahe Island, Inner Islands, Seychelles, Indian
Depth (m): 3
  • Paratype: Winterbottom, R. 2001. Aqua: Journal of Ichthyology and Aquatic Biology. 5 (1): 22, fig. 3.
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Ecology

Habitat

Environment

reef-associated; marine; depth range 0 - 28 m (Ref. 90102)
  • Allen, G.R. and M.V. Erdmann 2012 Reef fishes of the East Indies. Perth, Australia: Universitiy of Hawai'i Press, Volumes I-III. Tropical Reef Research. (Ref. 90102)
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Depth range based on 5 specimens in 1 taxon.
Water temperature and chemistry ranges based on 3 samples.

Environmental ranges
  Depth range (m): 2 - 18
  Temperature range (°C): 26.041 - 28.006
  Nitrate (umol/L): 0.355 - 0.402
  Salinity (PPS): 34.563 - 34.828
  Oxygen (ml/l): 4.503 - 4.713
  Phosphate (umol/l): 0.220 - 0.241
  Silicate (umol/l): 3.269 - 4.752

Graphical representation

Depth range (m): 2 - 18

Temperature range (°C): 26.041 - 28.006

Nitrate (umol/L): 0.355 - 0.402

Salinity (PPS): 34.563 - 34.828

Oxygen (ml/l): 4.503 - 4.713

Phosphate (umol/l): 0.220 - 0.241

Silicate (umol/l): 3.269 - 4.752
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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Conservation

Threats

Not Evaluated
  • IUCN 2006 2006 IUCN red list of threatened species. www.iucnredlist.org. Downloaded July 2006.
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