Species: Gobiosoma nudum, Knobchin Goby
D 11; A 9; pectoral 20

pores: opercle 0; preopercle 3
Gobiosoma nudum (Meek & Hildebrand, 1928)
Knobchin Goby
Body robust; head rounded; snout blunt; tip of snout with a small central fleshy knob; chin with 2 small barbels; a tiny barbel before the eye; 1 pore between eyes; 0 pores over opercle; preopercle with 3 pores; front nostril tubular, rear with raised rim; mouth oblique; upper lip separated from snout by a groove along its top edge; no teeth on roof of mouth; tongue round to blunt; gill membranes broadly joined to body under throat, with 5 rays; dorsal fin VII (none filamentous) + I, 11 (10-12) rays; length of 2nd dorsal base > distance from 2nd dorsal base to tail fin; anal fin I, 9 (8-9) rays; pectoral rays 20 (18-20); pelvic fins I, 5, fused in a round disc; scales usually absent (sometimes 1-4 scales just behind base of pectoral fin and two scales on base of tail fin); no lateral line.
Head and body with grey-brown irregular bars that have numerous pales spots superimposed on them; a midlateral row of small elongate dark spots in middle of each dark bar.
Size: reaches 4.5 cm.
Inhabits tide pools and shallow rocky reefs; also in freshwater.
Depth: 0-10 m.
Note: An E Pacific species that has passed through the Panama Canal to the Atlantic entrance thereof.

High Resolution Map Download
- Salinity
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- Brackish
- Freshwater
- Non Marine
- Inshore/Offshore
-
- Inshore
- Inshore Only
- Water Column Position
-
- Bottom
- Bottom only
- Habitat
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- Rocks
- Sand & gravel
- Estuary
- Freshwater
- Reef (rock/coral/oyster)
- Reef and soft bottom
- Reef associated (reef + edges-water column & soft bottom)
- FishBase Habitat
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- Reef Associated
- Feeding Group
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- Carnivore
- Data
- Diet
-
- Data
- Mobile benthic crustacea (shrimps/crabs)
- Mobile benthic gastropods/bivalves
- Mobile benthic worms
- Egg Type
-
- Benthic
- Data
- Pelagic larva
- Global Endemism
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- All species
- Exotic (Introduced)
- Greater Caribbean non-endemic
- Regional Endemism
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- Continent
- Continent only
- Exotic (Introduced)
- GC non-endemic
- All species
- Residency
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- Vagrant
- Climate Zone
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- Equatorial (0-10N, Costa Rica / Venezuela)
- IUCN Red List
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- Data deficient
- Listed
- CITES
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- Not listed
- Length Max
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- 4.5
- Depth Range Min
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- 0
- Depth Range Max
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- 10