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Species: Histrio histrio, Sargassumfish, Sargassumfish Frogfish

All Families:   All Genera:   All Species:

skin smooth
brown + white blotches & irregular dark lines
C barred
pectoral not connected to body
pelvics long



Histrio histrio (Linnaeus, 1758)

Sargassumfish, Sargassumfish Frogfish

A globular somewhat compressed body; head not spiny; eyes on sides of head; a very large, upward directed mouth with many small teeth; a small round gill opening, below and behind pectoral base; dorsal rays I+I+I,11-13; fishing pole half length of 2nd dorsal spine, lure oval, with numerous parallel folds, a cluster of short filaments at its base; 2nd dorsal spine narrow, straight to slightly curved, not connected to head by membrane; 3rd dorsal spine movable, connected to head by skin, with numerous papillae and appendages; limb-like pectoral fins with an "elbow" joint, that fin not connected to body; pelvic fins long (>25% of SL); with a tail base; all rays of tail fin branched; skin of body smooth, appears naked; body and fins with numerous skin flaps.

Olive to yellowish to brown, with numerous white flecks; often dark brown mottling and reticulations on body and fins; tail with several irregular dark bars.

Reaches 20 cm.

Usually found in association with floating Sargassum seaweed, but also occurs in mangroves and seagrass beds.

Depth range of adults 0-5 m; larvae at 50-600 m.

The Indo-west Pacific and both sides of the Atlantic, Maine to Ururguay.

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  • Brackish
  • Marine
  • In & Offshore
  • Inshore
  • Offshore
Water Column Position
  • Bottom
  • Bottom + water column
  • Near Surface
  • Surface
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Submerged vegetation
  • Water column
  • Estuary
  • Flotsam
  • Mangrove
  • Reef (rock/coral/oyster)
  • Reef and soft bottom
  • Reef associated (reef + edges-water column & soft bottom)
FishBase Habitat
  • Bentho-Pelagic
  • Reef Associated
Feeding Group
  • Carnivore
  • Data
  • Data
  • Bony fishes
  • Mobile benthic crustacea (shrimps/crabs)
Egg Type
  • Data
  • No pelagic larva
  • Pelagic
Global Endemism
  • All species
  • Circumtropical ( Indian + Pacific + Atlantic Oceans)
  • Greater Caribbean non-endemic
Regional Endemism
  • Also in Brazil
  • 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
  • Equatorial (0-10N, Costa Rica / Venezuela)
  • Subtropical (23-35N, Florida / Carolinas / Bermuda)
  • Temperate (>35N)
  • Tropical (10-23N, Nicaragua / Cuba)
IUCN Red List
  • Least concern
  • Listed
  • Not listed
Length Max
  • 20
Depth Range Min
  • 0
Depth Range Max
  • 5