Main identification features
- head deep
- adult - preopercular spine 2-3 points
- cheek 8-10 vertical scale rows
Walker’s brotula
Body elongate and somewhat compressed; head relatively narrow (usually <10% of SL) and deep (height usually >16% of SL); snout rounded; a sharp spine on opercle that has 2-3 tips in adults; eye relatively large (1.9-2.8% of SL); upper part of preopercle with a pore; gill rakers 13-16; origin of dorsal fin at level of middle of pectoral fins; pelvic fins inserted below rear part of head; dorsal rays 64-72; anal rays 49-54; origin of anal fin under dorsal rays 20-24; pectoral rays 18-20; tail fin rays 16; body covered with tiny overlapping scales, about 110 in midlateral series; patch of cheek scales with 8-10 vertical rows of scales; belly with scales; penis moderately long, curved, tapering, thin; 2 pairs of long pseudoclaspers associated with penis, outer pair broad, wing shaped, with pointed tip, inner pair with 3 branches at tip, front branch long and curved, rear branch short, a thick fleshy lobe in between.
Probably brown.
Size: reaches 7.1 cm.
Inhabits shallow reefs.
Depth: 1-8 m.
Southern Mexico to El Salvador.
Attributes
Cites: Not listed.
Climate Zone: Northern Tropical (Mexican Province to Nicaragua + Revillagigedos).
Depth Range Max: 8 m.
Depth Range Min: 1 m.
Diet: mobile benthic crustacea (shrimps/crabs); bony fishes.
Eastern Pacific Range: Northern limit=19; Southern limit=13; Western limit=-105; Eastern limit=-89; Latitudinal range=6; Longitudinal range=16.
Egg Type: Live birth; Pelagic larva.
Feeding Group: Carnivore.
FishBase Habitat: Demersal.
Global Endemism: East Pacific endemic; Tropical Eastern Pacific (TEP) endemic; All species.
Habitat: Rocks; Reef associated (reef + edges-water column & soft bottom); Reef only; Reef (rock &/or coral).
Inshore Offshore: Inshore; Inshore Only.
IUCN Red List: Not evaluated / Listed.
Length Max: 7.1 cm.
Regional Endemism: TEP endemic; Continental TEP endemic; Mexican province endemic; Continent only; Continent; All species.
Residency: Resident.
Salinity: Marine; Marine Only.
Water Column Position: Bottom; Bottom only;
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- Møller, P.R., Schwarzhans, W., Nielsen, J.G., 2005., Review of the American Dinematichthyini (Teleostei: Bythitidae). Part II. Ogilbia., Aqua, 10:133-207.
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