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Species: Cynoscion acoupa, Acoupa Weakfish

All Families:   All Genera:   All Species:

plain color
D2 17-22, 2-3 rows scales on base
C blunt point
inner lower teeth: larger at rear
A 8
pectoral ~ pelvic
body scales rough, = / > LL scales

Cynoscion acoupa (Lacepede, 1801)

Acoupa Weakfish

Elongate, fusiform, compressed, oval cross-section; head low, not spongy on top; eye moderate; mouth large, oblique, lower jaw slightly projecting; teeth in multiple rows with 1-2 large canines at tip of upper jaw, lower jaw with an inner row of large teeth that gradually increase in size to the rear; gill rakers long and slender, 10-16; no pores or barbels on chin; 2 pores on side of snout; margin of preopercle smooth; top corner of gill opening notched; dorsal rays X + I, 17-22 (usually 18-20); anal rays II, small (< ½ length of 1st ray) weak spines, 8 (7-9); pectoral fins about = to pelvic fins; rear margin of tail with blunt angular point; scales large, rough on body, smooth on head; body scales equal or larger than lateral line scales; soft dorsal with 2-3 rows of small scales on base; lateral line arched anteriorly and straight well before level of anus, extends to the center of the end of the tail fin.

Body uniform silver; with diffuse dark areas along base of dorsal fins; lower head and body, and lower parts of pectoral, pelvic and anal yellowish orange; inside opercle dusky.

Size: reaches 120 cm.

Inhabits sandy-mud and rocky bottoms of coastal waters, including estuaries, mangrove swamps and river mouths; enters freshwater.

Depth: 1-22 m.

Panama to Brazil.

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  • Brackish
  • Freshwater
  • Marine
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Sand & gravel
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Soft bottom only
  • Estuary
  • Freshwater
  • Mangrove
  • Mud
FishBase Habitat
  • Demersal
Feeding Group
  • Carnivore
  • Data
  • Data
  • Bony fishes
  • Mobile benthic crustacea (shrimps/crabs)
Egg Type
  • Data
  • Pelagic
  • Pelagic larva
Global Endemism
  • All species
  • Greater Caribbean non-endemic
  • West Atlantic Endemic
Regional Endemism
  • Also in Brazil
  • Continent
  • Continent only
  • Extends South of GC
  • GC non-endemic
  • All species
  • Resident
Climate Zone
  • Equatorial (0-10N, Costa Rica / Venezuela)
IUCN Red List
  • Least concern
  • Listed
  • Not listed
Length Max
  • 120
Depth Range Min
  • 1
Depth Range Max
  • 22