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Species: Rhinoptera bonasus, Cownose Ray

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7 (6-8) rows narrow, deep tooth plates

Rhinoptera bonasus (Mitchill, 1815)

Cownose Ray

Disc angular, nearly twice as wide as long; head and snout strongly marked off from and raised above front of disc; forehead overhangs blunt, concave snout that is notched in front, lower part with pair of broadly rounded lobes separated by central notch; eyes and spiracles on side of head; mouth without fleshy papillae on its floor; 6-8 (average 7) rows of relatively narrow and deep, large plate-like crushing teeth on both jaws; moderate sized dorsal fin at tail base; no tail fin or fin folds; tail long and slender.

Top uniform brown; underside white to yellowish.

Reaches a disc width of ~110 cm.

Benthic on soft bottoms and in the water column.

Depth: 0-96 m.

New England to Argentina.

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  • Brackish
  • Marine
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Mid Water
  • Near Bottom
  • Near Surface
  • Surface
  • Sand & gravel
  • Water column
  • Beach
  • Estuary
  • Mud
FishBase Habitat
  • Bentho-Pelagic
Feeding Group
  • Carnivore
  • Data
  • Data
  • Bony fishes
  • Mobile benthic crustacea (shrimps/crabs)
  • Mobile benthic gastropods/bivalves
  • Sea-stars/cucumbers/urchins
Egg Type
  • Data
  • Live birth
  • No pelagic larva
Global Endemism
  • All species
  • Greater Caribbean non-endemic
  • West Atlantic Endemic
Regional Endemism
  • Also in Brazil
  • Continent
  • Continent + Island (s)
  • Continental primarily
  • 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
  • Listed
  • Near threatened
  • Not listed
Length Max
  • 110
Depth Range Min
  • 0
Depth Range Max
  • 96