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Gillellus chathamensis Dawson, 1977
COCOS STARGAZER
Cocos sand-stargazer

Life   Vertebrata   Fish   Dactyloscopidae   Gillellus

Gillellus chathamensis
© Copyright Ross Robertson, 2006 · 12
Gillellus chathamensis

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Overview
Main identification features
  • eyes not stalked
  • d: ii (high) + viii-xii
  • body: ~7 dark saddles
  • flaps - lower lips only
Dorsal rays II + VIII-XII, 28-32 (usually 29-30); segmented anal rays 28-32 (usually 29-30); pectoral rays 12-14 (usually 13); total lateral-line scales 50-56; scales in straight (posterior) part of lateral line 23-25; lateral line deflected ventrally below dorsal fin elements 17-21; principal segmented caudal rays 10; high isolated dorsal finlet on nape composed of 2 spines.

Overall white with seven dark-edged light grey to brownish saddles on upper sides.

Grows to 3.8 cm.

Habitat: sandy bottoms.

Depth range 1-15 m.

Known only from Cocos.


Attributes
Abundance: Common.
Cites: Not listed.
Climate Zone: Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo).
Depth Range Max: 15 m.
Depth Range Min: 1 m.
Diet: bony fishes; mobile benthic worms; mobile benthic gastropods/bivalves; mobile benthic crustacea (shrimps/crabs).
Eastern Pacific Range: Northern limit=6; Southern limit=6; Western limit=-88; Eastern limit=-87; Latitudinal range=1; Longitudinal range=1.
Egg Type: Benthic; Pelagic larva.
Feeding Group: Carnivore.
FishBase Habitat: Demersal.
Global Endemism: Tropical Eastern Pacific (TEP) endemic; East Pacific endemic; All species.
Habitat: Reef associated (reef + edges-water column & soft bottom); Sand & gravel; Soft bottom (mud, sand,gravel, beach, estuary & mangrove); Soft bottom only.
Inshore Offshore: Inshore; Inshore Only.
IUCN Red List: Not evaluated / Listed.
Length Max: 3.8 cm.
Regional Endemism: Island (s) only; Island (s); TEP endemic; TEP oceanic island (s) endemic; Cocos Island endemic; All species.
Residency: Resident.
Salinity: Marine; Marine Only.
Water Column Position: Bottom; Bottom only;


Names
Scientific source:

Links to other sites

References
  • Dawson, C.E., 1977., Studies on eastern Pacific sand stargazers (Pisces: Dactyloscopidae). 4. Gillellus, Sindoscopus new genus, and Heteristius with description of new species., Proc. Calif. Acad. Sci., 41(2):125-160.

Acknowledgements

I thank Ashley MacDonald and John Pickering, University of Georgia, for technical support in building this page.


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http://192.134.151.83/Summary/speciesSummary.php?genusname=Gillellus&speciesname=chathamensis ---> https://fishbase.mnhn.fr/Summary/speciesSummary.php?genusname=Gillellus&speciesname=chathamensis
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