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NEFSC Apex Predators Program

porbeagle shark Porbeagle shark

PORBEAGLE SHARK

Lamna nasus

SIZE

To about 12 ft (3.7 m).

DISTINGUISHING CHARACTERISTICS

  • First dorsal fin with white patch at trailing edge
  • Caudal fin lunate; two keels - one prominent, one secondary
  • Snout conical
  • Teeth smooth, bladelike with lateral cusplets
  • Color dark bluish-gray to brown above, white below

DISTRIBUTION

Newfoundland, Canada, to Massachusetts; seasonally to New Jersey. Common in U.S. Northeast.

HABITAT

Continental shelf waters from surface to bottom to 1,200 ft (366 m) and <66°F (19°C); juveniles farther inshore.

SIMILAR SPECIES

White shark, shortfin mako and longfin mako lack any secondary keels on caudal fins, lateral cusplets on teeth. White shark has triangular teeth with serrated edges, blunter snout.

MORE INFORMATION


Guide to Sharks, Tunas, & Billfishes of the U.S. Atlantic and Gulf of Mexico.

Text descriptions taken from:
Guide to Sharks, Tunas, & Billfishes
of the U.S. Atlantic and Gulf of Mexico

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(File Modified Aug. 08 2017)