Shorefishes of the Eastern Pacific online information system

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Species: Prionotus stephanophrys, Blackfin searobin, Lumptail searobin

All Families:   All Genera:   All Species:

mouth long
D: black outer spot
C & D2: spotted
preopercular crest: 1 rear spine
pectoral: free rays short, fin long, black

Prionotus stephanophrys Lockington, 1881

Lumptail Searobin, Blackfin Searobin

Head moderately deep; wide between eyes; snout wide, slightly projecting snout plates; no transverse groove across top of head behind eyes; mouth long, rear margin of jaw reaching slightly beyond level of front of eye; center of radiation of bony ridges on cheek without a spine; a smooth spine at end of preopercle; teeth on jaws and roof of mouth simple; two separate dorsal fins, X + 12; pectoral fin 13, relatively long, reaching below middle of second dorsal fin, 3 free rays relatively short; body scales rough; nape and rear flap of operculum with scales; lateral-line scales 50-55.

Grey brown, underside white; pectoral fins a strongly contrasted black, with pale spots on rear part; 1st dorsal with a black blotch on outer part between fourth and fifth spines; second dorsal and caudal fin with rows of dark spots, forming bars in the latter.

Size: attains at least 43 cm.

Inhabits sand rubble bottoms.

Depth: 2-255 m.

Southern Baja California and the Gulf of California to Peru; the Galapagos and Malpelo.

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  • Brackish
  • Marine
  • Inshore Only
  • Inshore
Water Column Position
  • Bottom
  • Bottom only
  • Soft bottom only
  • Mud
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
FishBase Habitat
  • Demersal
Feeding Group
  • Carnivore
  • Data
  • Pelagic crustacea
  • Mobile benthic crustacea (shrimps/crabs)
  • Zooplankton
  • Bony fishes
  • Data
Egg Type
  • Pelagic
  • Pelagic larva
  • No data
Global Endemism
  • East Pacific endemic
  • All species
  • Tropical Eastern Pacific (TEP) endemic
Regional Endemism
  • Continent + Island (s)
  • TEP endemic
  • Continent
  • Island (s)
  • All species
  • Resident
Climate Zone
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
  • North Temperate (Californian Province &/or Northern Gulf of California)
  • Northern Tropical (Mexican Province to Nicaragua + Revillagigedos)
  • South Temperate (Peruvian Province )
  • Northern Subtropical (Cortez Province + Sinaloan Gap)
IUCN Red List
  • Least concern
  • Listed
  • Not listed
Length Max
  • 43
Depth Range Min
  • 2
Depth Range Max
  • 255