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Species: Diodon eydouxii, Pelagic porcupinefish

All Families:   All Genera:   All Species:

body blue + spots
D & A angular
body & fins: many spots
snout spines < body spines
top tail base: 2+ spines
many large erectile spines

Diodon eydouxii Brissout de Barneville, 1846

Pelagic Porcupinefish

Body slender, inflatable; head wide and blunt; eyes large; nasal organ a flat short tentacle with 2 openings; teeth fused into a strong, parrot-like beak with two plates that lack a front groove, large, opens widely at front; gill opening a vertical slit before pectoral base; pectorals large; fins without spines; no pelvic fins; dorsal fin 16-18 rays; anal 16-18 rays; pectoral 19-22 rays; dorsal and anal fins of adult curved and pointed; body and head covered with numerous long (> eye), erectible, 2-rooted, slender, round spines; > 20 spines between snout and dorsal fin; 10-14 spines between lower jaw and anus; 2 or more small, fixed spines on top of tail base; spines on snout shorter than those an body; a short, fixed spine immediately above gill opening.

Medium to dark blue above, shading to white below; a dark blue bar from eye down and forwards; top and sides with black or dark blue < eye sized spots, mostly at spine bases, but no large dark blotches; round spots on dorsal, tail and pectoral fins; anal dusky.

Size: 30 cm.

Habitat: oceanic, epipelagic.

Depth: 0-10 m.

Circumtropical; throughout the TEP except the Gulf of California.

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  • Marine
  • Marine Only
  • Offshore
  • Offshore Only
Water Column Position
  • Near Surface
  • Mid Water
  • Surface
  • Water column only
  • Water column
FishBase Habitat
  • Pelagic
Feeding Group
  • Carnivore
  • Planktivore
  • Data
  • Pelagic fish larvae
  • Pelagic crustacea
  • Bony fishes
  • Data
  • Zooplankton
Egg Type
  • Pelagic
  • Pelagic larva
  • No data
Global Endemism
  • Transisthmian (East Pacific + Atlantic of Central America)
  • All Pacific (West + Central + East)
  • All species
  • East Pacific + Atlantic (East +/or West)
  • TEP non-endemic
  • East Pacific + all Atlantic (East+West)
  • "Transpacific" (East + Central &/or West Pacific)
  • Circumtropical ( Indian + Pacific + Atlantic Oceans)
Regional Endemism
  • Continent + Island (s)
  • Island (s)
  • Eastern Pacific non-endemic
  • Continent
  • Tropical Eastern Pacific (TEP) non-endemic
  • All species
  • Resident
Climate Zone
  • Northern Subtropical (Cortez Province + Sinaloan Gap)
  • North Temperate (Californian Province &/or Northern Gulf of California)
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
  • Northern Tropical (Mexican Province to Nicaragua + Revillagigedos)
IUCN Red List
  • Not evaluated / Listed
  • Not listed
Length Max
  • 30
Depth Range Min
  • 0
Depth Range Max
  • 10