Species: Microdesmus affinis, Olivaceous goby, Short-tail worm-goby


chin - knob
A 41
Microdesmus affinis Meek & Hildebrand, 1928
Olivaceous goby, Short-tail worm-goby
Slender, wormlike, body height 3-9% of SL; tail (without fin) 48% of SL; eyes small but not tiny, not skin covered, on side of head; snout and lower jaw with well defined ridges; mouth small, oblique; lower jaw strongly projecting, with small fleshy lump at chin, lips thin, with small side flanges; teeth small, close-set, in 2 rows; gill opening large (not tubular), about length of base of pectoral; dorsal fin spines evenly spaced, 69 elements, origin over rear 1/3 of pectoral; anal II, 41; pectoral 12 rays; pelvics I, 3, shorter than pectorals; tail fin rounded, short; dorsal and anal fins confluent with tail fin; scales small, non-overlapping, well separated; scales with 19 radiating lines; snout and lower jaw scaleless.
(Preserved fish) uniform olive; tail slightly dusky, other fins clear.
Size: 11 cm.
Habitat: estuaries.
Depth: 0-10 m.
SW and eastern Gulf of California to Ecuador.

High Resolution Map Download
- Salinity
-
- Non Marine
- Brackish
- Inshore/Offshore
-
- Inshore Only
- Inshore
- Water Column Position
-
- Bottom
- Bottom only
- Habitat
-
- Soft bottom only
- Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
- Mud
- Sand & gravel
- Estuary
- FishBase Habitat
-
- Demersal
- Feeding Group
-
- Carnivore
- No Data
- Diet
-
- Mobile benthic crustacea (shrimps/crabs)
- No Data
- Mobile benthic worms
- Egg Type
-
- Pelagic larva
- Benthic
- No data
- Global Endemism
-
- All species
- Tropical Eastern Pacific (TEP) endemic
- East Pacific endemic
- Regional Endemism
-
- Continent
- All species
- Continent only
- Continental TEP endemic
- 3 provinces (Cortez + Mexican + Panamic) endemic
- TEP endemic
- Residency
-
- Resident
- Climate Zone
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- Northern Tropical (Mexican Province to Nicaragua + Revillagigedos)
- North Temperate (Californian Province &/or Northern Gulf of California)
- Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
- Northern Subtropical (Cortez Province + Sinaloan Gap)
- IUCN Red List
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- Data deficient
- Listed
- CITES
-
- Not listed
- Length Max
-
- 11
- Depth Range Min
-
- 0
- Depth Range Max
-
- 10