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Species: Squaliolus laticaudus, Big-eye Dwarf Shark, Spined Pigmy Shark

All Families:   All Genera:   All Species:

snout long, bulbous, conical
eye large
D1 with spine, D2 without
D2 base 2X D1 base
D1 origin over rear tip pectoral
dark, fin edges light
top teeth: 22-23 slender daggers; bottom teeth 16-21 nearly erect blades
no A



Squaliolus laticaudus Smith & Radcliffe, 1912

Spined Pigmy Shark, Big-eye Dwarf Shark

Head cylindrical, snout very long (~1/2 head), bulbously conical, slightly pointed; anterior nasal flaps very short, not expanded into barbels; eye large (61-82% of snout before eye), upper eyelid broadly arched; gill openings very small, wide; lips thin, top lip paired lateral papillae weak or absent; teeth very different in upper and lower jaws; top teeth small, with a single narrow, acute, erect cusp, lowers much larger, bladelike, with a high, moderately broad, nearly erect cusp and blade at side, 21-23 above, 16-21 below; flank denticles without rear points, with flat, depressed crowns; 1st dorsal fin with a spine (may be covered with skin), origin over inner margin or free rear tip of pectoral fin; 2nd dorsal without a spine, much larger than 1st dorsal, base about twice as long as 1st base, origin over front ½ of pelvic base; pectoral fins with short, narrowly rounded free rear tips and inner margins; cloaca not expanded as a luminous gland; no precaudal pits or midventral keels, but with low lateral keels on caudal peduncle; tail fin almost symmetrical, paddle–shaped, with a short upper and long lower lobe and a strong subterminal notch; lower body surface covered with light organs.

Blackish to blackish–brown with conspicuously light–margined fins.

Reaches 28 cm

Epipelagic, vertical migrations, deeper during day.

Depth range 60 - 1200 m over deep water.

Atlantic & Indo-west Pacific; Canada to Suriname.

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  • Marine
  • Marine Only
  • Offshore
  • Offshore Only
Water Column Position
  • Mid Water
  • Near Bottom
  • Water column only
  • Water column
FishBase Habitat
  • Bathypelagic
  • Pelagic
Feeding Group
  • Carnivore
  • Data
  • Data
  • Bony fishes
  • Octopus/squid/cuttlefish
Egg Type
  • Data
  • Live birth
  • No pelagic larva
Global Endemism
  • All species
  • Circumtropical ( Indian + Pacific + Atlantic Oceans)
  • Greater Caribbean non-endemic
Regional Endemism
  • Continent
  • Continent + Island (s)
  • Extends N + S of GC
  • Extends North of GC
  • Extends South of GC
  • GC non-endemic
  • Island (s)
  • All species
  • Resident
Climate Zone
  • Subtropical (23-35N, Florida / Carolinas / Bermuda)
  • Temperate (>35N)
IUCN Red List
  • Least concern
  • Listed
  • Not listed
Length Max
  • 28
Depth Range Min
  • 60
Depth Range Max
  • 1200