Shorefishes of the Greater Caribbean online information system

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Species: Coryphopterus hyalinus, Glass Goby, Glass Sand-goby

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lower part of eye black
dark face mask
pectoral base: no white horizontal bar

Coryphopterus hyalinus Bohlke & Robins, 1962

Glass Goby, Glass Sand-goby

Snout profile slightly rounded; head pores present, 2 small pores between front of eyes, 1 central pore just behind eye; 1 pair between rear nostrils; papillae on cheek in horizontal rows; eye large; anterior nostril a tube, posterior a simple hole; mouth small, relatively horizontal; gill membranes broadly joined to body under throat, with 5 rays; dorsal fin VI + I, 9; length of 2nd dorsal base > distance from 2nd dorsal base to tail fin; anal fin I, 9; pectoral fin 15 (14-15); pelvic fins I, 5, all rays branched, fins mostly separate with a reduced front membrane; body covered with scales, scales large, rough, absent from head, 24-26 in lateral series; no lateral line.

Head and body translucent, body with dark cross-hatching at scale edges and pepper spots; snout dark; a dark stripe from snout through eye; side of head and nape orange; ar row of ~8 elongate white dashes along spine from eye to tail base, those separated by orange blotches; a thin dark line under that row of orange and white blotches; dark dots above anal fin and under dorsal fin; a black ring around anus; genital papilla not black, but may be speckled.

Reaches: 4 cm.

Depth: 3-52 m.

Habitat: Found in aggregations swimming about 0.5 m above the substrate, around coral dropoffs and ledges.

Bermuda to the S Caribbean.

Note: difficult to distinguish from C.personatus

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  • Marine
  • Marine Only
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Bottom + water column
  • Near Bottom
  • Reef only
  • Rocks
  • Water column
  • Corals
  • Reef (rock/coral/oyster)
  • Reef associated (reef + edges-water column & soft bottom)
FishBase Habitat
  • Reef Associated
Feeding Group
  • Data
  • Planktivore
  • Data
  • Zooplankton
Egg Type
  • Benthic
  • Data
  • Pelagic larva
Global Endemism
  • All species
  • Greater Caribbean endemic
  • West Atlantic Endemic
Regional Endemism
  • Continent
  • Continent + Island (s)
  • Continental primarily
  • 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
  • Listed
  • Vulnerable
  • Not listed
Length Max
  • 4
Depth Range Min
  • 3
Depth Range Max
  • 52