Species: Lythrypnus cobalus, Knave goby
Cocos Island
Lythrypnus cobalus Bussing, 1990
Knave goby
Body robust; head round; with fleshy crest along top of head and nape; mouth very oblique; head without pores; papillae around mouth, on cheeks and operculum and over eye; front nostril a long tube, rear nostril a raised rim; tongue round to blunt; 5-7 gill rakers; dorsal fin VI (2nd and 3rd spines filamentous in male)+ I, 18 (17-19) rays; I, 14-15 anal rays; 21-22 (20-23) pectoral rays; pectoral rays unbranched; pelvics fused into disc; tail fin short, round, with 17 segmented rays; scales rough, none on head, nape, chest and pectoral base; ~ 43 lateral scale rows.
Head and body red; 4-7 thin blue, dark-margined bars on body and 3 on head; dorsal, tail and anal fins orange, paler distally; pectorals and pelvics blue-grey; 5 black dots along underside of tail base.
Size: 2.6 cm.
Habitat: rocky bottoms.
Depth: 30-90 m.
Cocos Island.
High Resolution Map Download
- Salinity
-
- Marine
- Marine Only
- Inshore/Offshore
-
- Inshore Only
- Inshore
- Water Column Position
-
- Bottom only
- Bottom
- Habitat
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- Reef only
- Rocks
- Reef associated (reef + edges-water column & soft bottom)
- Reef (rock/coral/oyster)
- FishBase Habitat
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- Demersal
- Feeding Group
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- Carnivore
- No Data
- Planktivore
- Diet
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- Mobile benthic crustacea (shrimps/crabs)
- No Data
- Zooplankton
- Egg Type
-
- Pelagic larva
- No data
- Benthic
- Global Endemism
-
- East Pacific endemic
- Tropical Eastern Pacific (TEP) endemic
- All species
- Regional Endemism
-
- All species
- Island (s)
- TEP oceanic island (s) endemic
- TEP endemic
- Island (s) only
- Cocos Island endemic
- Residency
-
- Resident
- Climate Zone
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- Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
- IUCN Red List
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- Listed
- Data deficient
- CITES
-
- Not listed
- Length Max
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- 2.6
- Depth Range Min
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- 30
- Depth Range Max
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- 90
