Gymnocranius obesus


Obese large-eye bream
Characteristic features:
Colour:

Silvery grey; no blue markings on snout and cheek; dark bars on sides of body, 4th dark bar running from 6th dorsal-fin spine to anal-fin origin; fins clear with yellowish margins.

Size:

Up to 30 cm SL.

Distribution:

East Indian-West Pacific, in tropical waters.

Habitat:

Reef associated.

Indonesian fisheries:

Caught by longlining.

Similar species:

Gymnocranius elongatus
Forktail large-eye bream

Gymnocranius elongatus

Gymnocranius elongatus differs in having a deeply forked caudal fin, the median rays shorter than eye diameter (vs. moderately forked caudal fin, the median rays longer than eye diameter) and lower edge of eye level with snout tip to middle of caudal-fin fork (vs. lower edge of eye above line from snout tip to middle of caudal-fin fork).

Gymnocranius frenatus
Yellowsnout large-eye bream

Gymnocranius frenatus

Gymnocranius frenatus differs in having 3 or 4 oblique, wavy blue lines on snout and cheek (vs. no blue markings on snout or cheek).

Gymnocranius grandoculis
Blue-lined large-eye bream

Gymnocranius grandoculis

Gymnocranius grandoculis differs in having horizontal, wavy blue lines present in specimens >20 cm TL (vs. no blue markings on snout and cheek).

Gymnocranius microdon
Bluespotted large-eye bream

Gymnocranius microdon

Gymnocranius microdon differs in having vertically elongate blue spots on snout and cheek (vs. no blue markings on snout and cheek).

Gymnocranius euanus
Japanese large-eye bream

Gymnocranius euanus

Gymnocranius euanus differs in having 4½ scale rows between lateral line and base of middle dorsal-fin spines (vs. 5½).

Gymnocranius satoi
Blacknape large-eye bream

Gymnocranius satoi

Gymnocranius satoi differs in having body silvery (vs. dark narrow bars on body); blue speckles on snout and cheek (vs. no markings) and inner edge of caudal-fin lobes convex (vs. straight).

Gymnocranius griseus
Grey large-eye bream

Gymnocranius griseus

Gymnocranius griseus differs in having a dark bar running from below sixth dorsal-fin spine to mid pelvic-anal space (vs. dark bar running from below sixth dorsal-fin spine to anal-fin origin) and 9–11 front scales on the top of head (vs. 4–6).