Shorefishes of the Greater Caribbean online information system

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Species: Hippocampus reidi, Longsnout seahorse, Slender seahorse

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body not deep
snout long
D 16-19, outer dark stripe
dense dark dots
pectoral 14-17

Hippocampus reidi Ginsburg, 1933

Slender seahorse, Longsnout seahorse

Neck curved, with head at about right angle to body; coronet variable, low and rounded or large and convoluted; body not deep; snout long (41-49% of head length, longer than part of head behind eye) and slender; cheek spines and eye spines broad, almost double; dorsal fin large, its base elevated, 17 (16-19) rays; pectorals 16 (15-17) rays and anal small; no pelvic fins; tail prehensile, curlable, without a tail fin; body spines low, rounded; 11 body rings, 35 (31-39) trunk rings; usually no skin appendages; brood pouch on trunk, but extends along 5-7 tail rings.

Head and body with densely scattered dark round spots of differing sizes on a light background; or white dots on a dark background; body often with dark crossbars; dorsal fin clear, with a dark stripe in from outer edge.

Reaches 17.5 cm.

Reefs, seagrass and macroalgal beds.

Depth range: 1-65 m.

Bermuda to Venezuela; its sister species in the Eastern Atlantic (and Brazil?) is H. aAlgiricus.

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  • Marine
  • Marine Only
  • Inshore Only
  • Inshore
Water Column Position
  • Bottom
  • Reef (rock/coral/oyster)
  • Submerged vegetation
  • Reef associated (reef + edges-water column & soft bottom)
  • Sand & gravel
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Reef and soft bottom
FishBase Habitat
  • Demersal
  • Reef Associated
Feeding Group
  • Data
  • Carnivore
  • Planktivore
  • Data
  • Mobile benthic crustacea (shrimps/crabs)
  • Zooplankton
Egg Type
  • Pelagic larva
  • Data
  • Live birth
Global Endemism
  • All species
  • West Atlantic Endemic
  • Greater Caribbean endemic
Regional Endemism
  • Continent + Island (s)
  • All species
  • Continent
  • GC endemic
  • Island (s)
  • Resident
Climate Zone
  • Subtropical (23-35N, Florida / Carolinas / Bermuda)
  • Tropical (10-23N, Nicaragua / Cuba)
  • Equatorial (0-10N, Costa Rica / Venezuela)
IUCN Red List
  • Listed
  • Near threatened
  • Appendix II
  • Listed
Length Max
  • 17.5
Depth Range Min
  • 1
Depth Range Max
  • 65