Overview

Comprehensive Description

Biology

Adults inhabit lagoon and seaward reefs. Ovoviviparous (Ref. 205). The male carries the eggs in a brood pouch which is found under the tail (Ref. 205).
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Distribution

Indo-Pacific: northern Red Sea and from Ulithi Atoll (Caroline Islands) eastward to the Society Islands.
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Western Pacific.
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Physical Description

Morphology

Dorsal spines (total): 0; Dorsal soft rays (total): 2531
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Size

Maximum size: 110 mm SL
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Max. size

11.0 cm SL (male/unsexed; (Ref. 1602))
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Type Information

Holotype for Corythoichthys nigripectus
Catalog Number: USNM 140230
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Preparation: Illustration
Collector(s): V. Brock, E. Herald, Donaldson, A. Welander, Potski & Bradner
Year Collected: 1946
Locality: Marshall Islands: Bikini Atoll, isolated coral area 100 yds offshore of Airukiiji (Arji) Island; Bikini Atoll, lagoon side., Bikini Atoll, Ralik Chain, Marshall Islands, Pacific
Depth (m): 12
  • Holotype:
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Paratype for Corythoichthys nigripectus
Catalog Number: USNM 140231
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Collector(s): V. Brock, E. Herald, Donaldson, A. Welander, Potski & Bradner
Year Collected: 1946
Locality: Marshall Islands: Bikini Atoll, isolated coral area 100 yds offshore of Airukiiji (Arji) Island; Bikini Atoll, lagoon side., Bikini Atoll, Ralik Chain, Marshall Islands, Pacific
Depth (m): 12
  • Paratype:
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Ecology

Habitat

Environment

reef-associated; marine; depth range 4 - 28 m (Ref. 1602)
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Depth range based on 3 specimens in 1 taxon.
Water temperature and chemistry ranges based on 3 samples.

Environmental ranges
  Depth range (m): 6.5 - 18
  Temperature range (°C): 25.689 - 25.778
  Nitrate (umol/L): 0.073 - 0.085
  Salinity (PPS): 35.264 - 35.280
  Oxygen (ml/l): 4.802 - 4.812
  Phosphate (umol/l): 0.166 - 0.175
  Silicate (umol/l): 0.819 - 0.910

Graphical representation

Depth range (m): 6.5 - 18

Temperature range (°C): 25.689 - 25.778

Nitrate (umol/L): 0.073 - 0.085

Salinity (PPS): 35.264 - 35.280

Oxygen (ml/l): 4.802 - 4.812

Phosphate (umol/l): 0.166 - 0.175

Silicate (umol/l): 0.819 - 0.910
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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Depth: 4 - 28m.
From 4 to 28 meters.

Habitat: reef-associated. Inhabits lagoon and seaward reefs.
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Life History and Behavior

Life Cycle

Male carries the eggs in a brood pouch (Ref. 205).
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Conservation

Threats

Not Evaluated
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