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Species: Prognathodes guyanensis, Guyana Butterflyfish

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3 black diagonal bars - eye, D to A, soft D

Prognathodes guyanensis (Durand, 1960)

Guyana Butterflyfish

Body a strongly compressed oval disc; mouth small, at end of a moderately long, pointed snout; cheek bone free and smooth; teeth long and slender, brush-like, in bands on jaws; dorsal fin XIII, 19, fin triangular, with front spines longest, membranes between anterior dorsal spines deeply incised; anal rays III, 15, 2nd anal spine longer than 3rd; pectoral rays 13; rear edges of dorsal and anal fins vertical; tail edge straight to rounded; scales rough, covering head and body, a low scaly sheath on base of dorsal fin; lateral line in a high arch, incomplete (ends under dorsal fin), with 37-41 scales; with a large "axillary process" scale at the upper base of the pelvic fins.

Pale yellow to white; 3 oblique black bars - 1 from front of dorsal fin through eye (becomes orange before eye), 1 from middle of spinous dorsal to soft anal, 1 from upper end of spinous dorsal to lower end of soft dorsal.

Size: grows to 15 cm.

Habitat: rocky reefs.

Depth range: 60 - 302 m.

North Carolina to Guyana.

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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
  • Data
  • Omnivore
  • Data
  • Sponges/seasquirts/bryozoa
  • Benthic microalgae
  • 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 + Island (s)
  • Extends South of GC
  • GC non-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
  • 15
Depth Range Min
  • 60
Depth Range Max
  • 302