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Species: Emblemariopsis diaphana, Florida Smoothhead Glass Blenny, Glass Blenny

All Families:   All Genera:   All Species:

no eye cirrus
D: front spines short, central spines longest, all < rays
female: front pale brown + lines white dots, D front white & brown, spinal column orange & white
male: black head, front D black + thin white border

Emblemariopsis diaphana Longley, 1927

Glass Blenny, Florida Smoothhead Glass Blenny

Body elongate; head short and blunt, without spines; snout with a pair of smooth bony ridges; no cirrus over eye; 1 row of teeth on each side of roof of mouth; dorsal fin XX-XXI, 12-14, in both sexes,1st and often 2nd dorsal spine longer than 3rd, then spines increase in size, with central spines longest, 1st soft ray twice length of 1st spine, female 1st 2 spines elevated; anal fin II, 21-23; pectoral rays 13; pelvics I (internal), 3, inserted before pectoral base, much shorter than pectorals; all fin rays unbranched; no lateral line; no scales.

Female: head and body to level of pectoral base translucent brownish olive, with white dots forming lines, with brown spots along lower jaw; rest of fish translucent; front of dorsal fin white and brown; spinal column orange-brown and white, top of head with oval or line between a V. Male: similar to female except with black head, often white spots on side of head, front of dorsal fin black, with thin white border.

Reaches 3 cm.

Habitat found on live massive corals.

Depth range: 1-22 m.

Florida to the SW Gulf of Mexico.

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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
  • Planktivore
  • Data
  • Zooplankton
  • Mobile benthic crustacea (shrimps/crabs)
  • 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
  • Gulf of Mexico endemic
  • Island (s)
  • All species
  • Resident
Climate Zone
  • Subtropical (23-35N, Florida / Carolinas / Bermuda)
  • Tropical (10-23N, Nicaragua / Cuba)
IUCN Red List
  • Least concern
  • Listed
  • Not listed
Length Max
  • 3
Depth Range Min
  • 1
Depth Range Max
  • 22