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Species: Stegastes partitus, Bicolor Damselfish

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pattern 1 - black front+ white rear
pattern 2 - white + black C
pattern 3 - black cap + yellow chest + white rear
juv like adult

Stegastes partitus (Poey, 1868)

Bicolor Damselfish

Body relatively elongate, robust, compressed; 1 pair of nostrils; margin of preopercle serrated; margin of bone under eye serrated, without notch between it and the bone before it; mouth small, protrusible, opens at front; teeth in single row, long and close-set incisors; 8-9 lower gill rakers; a single continuous dorsal fin, XII, 14-17; anal fin II, 13-15; dorsal and anal fins short, not reaching base of tail fin, soft lobes with angular tips; pectoral rays 18-20; no projecting short spines at upper and lower base of tail fin; caudal fin bluntly forked, lobes with angular tips; scales are moderately large and rough; body scaled, head largely scaled (snout scaled to nostrils), as are the basal parts of the median fins; lateral line incomplete, ends under end of dorsal fin base; lateral-line scales 18-21.

Adult variable and with intergrading patterns: 1. Black, soft dorsal, tail base and sometimes tail are white. 2. Upper head and back and front ½ of dorsal fin blackish; lower head, belly and flank, and pelvics orangish; rest of body, anal and tail fins white. 3 Head and body white; tail base and fin, and margins of dorsal and anal fins blackish; pectoral yellowish. Juvenile like adult

Size: reaches 10 cm; 13 y of age.

Shallow reefs in sheltered water.

Depth: 0-130 m.

North Carolina to the S Caribbean.

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  • Marine
  • Marine Only
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Reef only
  • Rocks
  • Sea anemones
  • Sponges
  • Corals
  • Reef (rock/coral/oyster)
  • Reef associated (reef + edges-water column & soft bottom)
FishBase Habitat
  • Reef Associated
Feeding Group
  • Data
  • Omnivore
  • 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)
  • 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
  • Least concern
  • Listed
  • Not listed
Length Max
  • 10
Depth Range Min
  • 0
Depth Range Max
  • 130