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Species: Cruriraja rugosa, Rough Leg Skate

All Families:   All Genera:   All Species:

snout triangular, no filament
nape + thorns
disc top covered with denticles
shoulders 0/2 thorns; rear disc no thorns
brown above, bluish below
tail thick, 2 Ds, denticles underneath
space between Ds < 1/2 D1 base
front edges Ds & C not black
pelvics: front lobe = leg
under disc bluish

Cruriraja rugosa Bigelow & Schroeder, 1958

Rough Leg Skate

Disc diamond shaped, wider (~1.3X) than long; snout moderately long (before eye 12% TL) and pointed with a simple, sharp point, with a support cartilage; disc front edge weakly convex with short concavity near snout tip, then weakly concave rounded tips of pectoral fins, convex at rear; pectoral fin supports extend 1/3 way along snout; pelvic fins large, deeply indented separation of leg-like front and rear lobes, side of rear lobe not joined to pectoral edge; tail broad at front, tapering to first dorsal fin, moderately long, length 57-58% TL; lateral tail folds well developed, along rear half of tail; two dorsal fins, medium–sized, similar in size and shape with rounded tips, those very close together (space between them ~1/4 of 1st dorsal base); tail fin with very small, poorly developed upper lobe only; upper surface of disc entirely & uniformly covered with fine denticles, including top of eyes, except along rear edges and on tip of snout; upper surface with thorns (adult): on snout, around inner front and rear edges of eyes; nape with 2 thorns; shoulders without thorns; thorns along mid-back from rear 1/3 of disc to 1st dorsal fin in a single row of ~47, an additional row of smaller thorns on each side of that low on tail, 1 thorn between dorsal fins; lower body surface without denticles; tail of adults covered with minute denticles above (except along midline), including dorsal fins and underside.

Uniform brown with bluish tinge above, bluish below; tail pale brown above and below, dorsal fins pale brown, with pale blotch on base.

Reaches 49 cm

Soft bottoms

Depth range 286-1174 m

Gulf of Mexico to Venezuela, Hispaniola to Grenada

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  • Marine
  • Marine Only
  • Offshore
  • Offshore Only
Water Column Position
  • Bottom
  • Bottom only
  • Sand & gravel
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Soft bottom only
  • Mud
FishBase Habitat
  • Bathydemersal
Feeding Group
  • Carnivore
  • Data
  • Data
  • Bony fishes
  • Mobile benthic crustacea (shrimps/crabs)
  • Mobile benthic worms
  • Octopus/squid/cuttlefish
Egg Type
  • Benthic
  • Data
  • No pelagic larva
  • No pelagic phase
Global Endemism
  • All species
  • Greater Caribbean endemic
  • West Atlantic Endemic
Regional Endemism
  • Continent
  • Continent + Island (s)
  • GC endemic
  • Island (s)
  • All species
  • Resident
Climate Zone
  • Equatorial (0-10N, Costa Rica / Venezuela)
  • Subtropical (23-35N, Florida / Carolinas / Bermuda)
  • Tropical (10-23N, Nicaragua / Cuba)
IUCN Red List
  • Data deficient
  • Listed
  • Not listed
Length Max
  • 49
Depth Range Min
  • 286
Depth Range Max
  • 1174