Overview

Comprehensive Description

Biology

Inhabits mainly oceanic drop-offs; in and around caves in vertical walls. Probably a schooling fish; feeding on plankton but radiolarians in the gut may indicate some feeding off the substrate (Ref. 38635).
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Distribution

Western Indian Ocean: Chagos Archipelago.
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Indian Ocean.
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Physical Description

Size

Max. size

1.4 cm SL (male/unsexed; (Ref. 38635))
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Type Information

Paratype for Trimmatom offucius Winterbottom & Emery
Catalog Number: USNM 224882
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Collector(s): Emery & R. Winterbottom
Year Collected: 1979
Locality: Chagos Archipelago: Peros Banhos, Off South End of Isle Poule On Outer Reef Over Drop-Off, Peros Banhos, British Indian Ocean Territory, Chagos Archipelago, Indian
Depth (m): 30 to 33
  • Paratype: Winterbottom, R. & Emery, A. R. 1981. Environmental Biology of Fishes. 6 (2): 146.
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Source: National Museum of Natural History Collections

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Ecology

Habitat

Environment

demersal; marine; depth range 15 - 50 m (Ref. 38635), usually 20 - 50 m (Ref. 38635)
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Depth range based on 1 specimen in 1 taxon.
Water temperature and chemistry ranges based on 1 sample.

Environmental ranges
  Depth range (m): 31.5 - 31.5
  Temperature range (°C): 27.855 - 27.855
  Nitrate (umol/L): 0.667 - 0.667
  Salinity (PPS): 34.880 - 34.880
  Oxygen (ml/l): 4.565 - 4.565
  Phosphate (umol/l): 0.231 - 0.231
  Silicate (umol/l): 4.751 - 4.751
 
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Conservation

Threats

Not Evaluated
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Relevance to Humans and Ecosystems

Benefits

Importance

fisheries: of no interest
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