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Species: Lythrypnus elasson, Dwarf Goby

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uniform red-grey, cheek 3-4 rows orange spots
pectoral base: 2 orange spots
male D1 black & orange blotches
D1 - 1st 2 spines elongate both sexes
25-26 lateral scales

Lythrypnus elasson Bohlke & Robins, 1960

Dwarf Goby

Body relatively deep, compressed; head compressed, profile round; high crest on nape extending from or just before dorsal to between eyes; head without pores; papillae around mouth, on cheeks and operculum and over eye; front nostril a long tube, rear nostril a raised rim; mouth oblique, opens at front; tongue truncate to broadly rounded; teeth in upper jaw in a wide band, outer row of enlarged conical teeth; gill opening narrow, ~pectoral base; gill membranes with 5 rays; dorsal fin VI, 1st 2 spines elongate in both sexes + I,9; length of 2nd dorsal base > distance from 2nd dorsal base to tail fin; anal fin I, 9; pectoral fin 17-19 (16-20); pelvic fins I, 5 disk complete; tail fin short, round, with 17 segmented rays; scales rough, body scaled except chest and pectoral base, 25-26 lateral rows, none on head and nape; no lateral line.

Uniform dark red-grey; dark stripes from back of eye to second dorsal fin; upper half of the body, with four dark blotches along midside; larger individuals solid dark brown or black. Female - pale, upper head and body mottled with blotches of olive-brown to red-brown, cheeks and operculum with 3-4 rows of orange spots radiating down from eye; pectoral base with 2 orange spots; tail finwith wavy bars, other fins uniform; male - more extensive dark mottling, 1st dorsal black + orange blotches at rear, dark violet to black when breeding; juveniles with brown blotches at rear & pale stripes at front, pale blotch bordered at front by dark bar on outer 1/2 of 1st dorsal.

Reachs 2 cm.

Found in coral reefs or isolated coral heads, generally under ledges.

Depth range: 10-152 m.

Gulf of Mexico to the S Caribbean.

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  • Marine
  • Marine Only
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Reef only
  • Rocks
  • Corals
  • Reef (rock/coral/oyster)
  • Reef associated (reef + edges-water column & soft bottom)
FishBase Habitat
  • Reef Associated
Feeding Group
  • Carnivore
  • Data
  • Data
  • Mobile benthic crustacea (shrimps/crabs)
  • Mobile benthic gastropods/bivalves
  • Mobile benthic worms
Egg Type
  • Benthic
  • Data
  • Pelagic larva
Global Endemism
  • All species
  • Greater Caribbean endemic
  • West Atlantic Endemic
Regional Endemism
  • Continent
  • Continent + Island (s)
  • GC endemic
  • Island (s)
  • All species
  • Resident
Climate Zone
  • Equatorial (0-10N, Costa Rica / Venezuela)
  • Subtropical (23-35N, Florida / Carolinas / Bermuda)
  • Tropical (10-23N, Nicaragua / Cuba)
IUCN Red List
  • Least concern
  • Listed
  • Not listed
Length Max
  • 2
Depth Range Min
  • 10
Depth Range Max
  • 152