Overview

Comprehensive Description

Biology

Inhabits mainly oceanic drop-offs between 20 to 30 m (Ref. 38635). One of the smallest (=shortest) vertebrate of the world, with mature females reaching only 8-10 mm SL; scaleless (Ref. 9360).
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Distribution

Western Indian Ocean: Chagos Archipelago and the Maldives. Western Central Pacific (Ref. 42915).
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Indo-West Pacific.
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Physical Description

Size

Maximum size: 100 mm SL
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Max. size

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

Paratype for Trimmatom nanus Winterbottom & Emery
Catalog Number: USNM 224881
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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Ecology

Habitat

Environment

demersal; marine; depth range 5 - 30 m (Ref. 38635), usually 20 - 30 m (Ref. 38635)
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Depth range based on 37 specimens in 1 taxon.
Water temperature and chemistry ranges based on 13 samples.

Environmental ranges
  Depth range (m): 1.525 - 40
  Temperature range (°C): 22.010 - 28.897
  Nitrate (umol/L): 0.066 - 1.204
  Salinity (PPS): 34.171 - 35.647
  Oxygen (ml/l): 4.454 - 5.013
  Phosphate (umol/l): 0.108 - 0.351
  Silicate (umol/l): 0.910 - 4.751

Graphical representation

Depth range (m): 1.525 - 40

Temperature range (°C): 22.010 - 28.897

Nitrate (umol/L): 0.066 - 1.204

Salinity (PPS): 34.171 - 35.647

Oxygen (ml/l): 4.454 - 5.013

Phosphate (umol/l): 0.108 - 0.351

Silicate (umol/l): 0.910 - 4.751
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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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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Wikipedia

Trimmatom nanus

Trimmatom nanus, the Midget dwarfgoby, is a species of marine goby native to the Indian Ocean and the western Pacific Ocean. It can mainly be found on oceanic drop-offs at depths of from 20 to 30 metres (66 to 98 ft) though it can occasionally be found in outer reef areas and lagoons at depths of from 5 to 35 metres (16 to 115 ft). This species can reach a length of 1 centimetre (0.39 in) SL.[1]

T. nanus was until 2004 the shortest known fish and vertebrate. The recent discovery of Schindleria brevipinguis (called the stout infantfish) relegated it to second place. Later, the discovery of Paedocypris progenetica dropped T. nanus to third place.

References[edit]

  1. ^ Froese, Rainer and Pauly, Daniel, eds. (2013). "Trimmatom nanus" in FishBase. June 2013 version.
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