Shorefishes of the Greater Caribbean online information system

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Species: Ptereleotris randalli, Bluestripe Dartfish

All Families:   All Genera:   All Species:

blue lines: top head, eye to opercle
Ds & A: edge red
C asymmetric: top pointed, bottom rounded, edges red

Ptereleotris randalli Gasparini, Rocha & Floeter, 2001

Bluestripe Dartfish

Body very elongate, compressed; head strongly compressed, with low fleshy ridge on top; mouth strongly oblique, opens above; lower jaw protruding, chin with longitudinal fold; upper jaw with 2 rows of teeth, inner row small and with 2 canines, outer with larger canine like teeth; lower jaw, 2 rows at front, canines present, sides with a single row; dorsal fin VI + I, 24 (23-25); anal fin I, 23 (22-24); pectoral fin 21 (20-22); pelvic fins I,4, nearly separate, no anterior membrane connecting them; tail 15 segmented rays, fin long, asymmetrically shaped - pointed on top & rounded on bottom; scales very small, embedded, smooth at front, rough near tail; head scaleless; no lateral line.

Body lavender grey to pale blue; a blue line along fleshy ridge on head to 1st dorsal; blue stripe from center of eye to end of opercle; dorsal fins with bright blue margin, orange to yellow submarginal stripe inside that; juvenile with bright yellow dorsal and anal fins, blue spots on rear of dorsal, bright yellow and brown area in center of tail.

Reaches: 12.5 cm.

Habitat: Found over sandy bottoms close to reefs.

Depth: 8-65 m.

The SE Caribbean to Brazil.

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  • Marine
  • Marine Only
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Sand & gravel
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Soft bottom only
  • Reef (rock/coral/oyster)
  • Reef associated (reef + edges-water column & soft bottom)
FishBase Habitat
  • Demersal
  • Reef Associated
Feeding Group
  • Data
  • Planktivore
  • Data
  • Zooplankton
Egg Type
  • Benthic
  • Data
  • 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)
IUCN Red List
  • Least concern
  • Listed
  • Not listed
Length Max
  • 12.5
Depth Range Min
  • 8
Depth Range Max
  • 65