Main identification features
- white tips: 1st dorsal fin pectoral, lower tail
- 1st dorsal fin very large, rounded
- pectoral very long, rounded
Snout moderately short and broadly rounded, length before mouth 5.4-7.1% of total length; ridge on back between dorsal fins usually present; origin of first dorsal fin slightly before inner rear corner of pectoral fins; first dorsal fin very large, with broadly rounded tip, its height 9.2-15.2% of total length; pectoral fins extremely long (length of front edge 20.2- 27.1% of total length), with broad round tips; origin of second dorsal in front of or over anal fin origin.
Brownish grey on back, becoming white ventrally; tips of first dorsal fin, paired fins, and caudal fin lobes broadly mottled white; anal fin usually blackish at tip and second dorsal fin may be dusky at tip; juveniles with most fins tipped with black.
Grows to 396 cm; 60-65 cm at birth.
Habitat: oceanic epipelagic.
Depth: 0-200 m.
Circumtropical; Southern California to the SW Gulf of California to Ecuador and the oceanic islands.
Attributes
Abundance: Common.
Cites: Not listed.
Climate Zone: Northern Subtropical (Cortez Province + Sinaloan Gap); Northern Tropical (Mexican Province to Nicaragua + Revillagigedos); Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo).
Depth Range Max: 200 m.
Depth Range Min: 0 m.
Diet: Pelagic crustacea; bony fishes; octopus/squid/cuttlefish; sea snakes/mammals/turtles/birds.
Eastern Pacific Range: Northern limit=33; Southern limit=-3; Western limit=-118; Eastern limit=-78; Latitudinal range=36; Longitudinal range=40.
Egg Type: Live birth; No pelagic larva.
Feeding Group: Carnivore.
FishBase Habitat: Pelagic.
Global Endemism: Circumtropical ( Indian + Pacific + Atlantic Oceans); East Pacific + Atlantic (East +/or West); Transisthmian (East Pacific + Atlantic of Central America); East Pacific + all Atlantic (East+West); All Pacific (West + Central + East); TEP non-endemic; "Transpacific" (East + Central &/or West Pacific); All species.
Habitat: Water column.
Inshore Offshore: Offshore; Offshore Only.
IUCN Red List: Near threatened; Listed.
Length Max: 396 cm.
Regional Endemism: Island (s); Continent; Continent + Island (s); Eastern Pacific non-endemic; Tropical Eastern Pacific (TEP) non-endemic; All species.
Residency: Resident.
Salinity: Marine; Marine Only.
Water Column Position: Mid Water; Near Surface; Surface; Water column only;
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- Bellido-Millán, J.M. and Villavicencio-Garayzar, C.J., 2002., Pesqueria artesanal de tiburon en la region central del Golfo de California. En: Lozano-Vilano, M. L. (Ed.). Libro Jubilar en Honor al Dr. Salvador Contreras Balderas., Universidad Autonoma de Nuevo León:143-152.
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- Eschmeyer , W. N. , Herald , E. S. and Hamman, H., 1983., A field guide to Pacific coast fishes of North America from the Gulf of Alaska to Baja California. Peterson Field Guide Ser. 28., Houghton Mifflin:336pp.
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- Love, M.S., Mecklenburg, C.W., Mecklenburg, T.A., Thorsteinson, L.K., 2005., es of the West Coast and Alaska: a checklist of North Pacific and Artic Ocena species from Baja California to the Alaska-Yukon border., U.S. Department of the Interior, U.S. Geological Survey, Biological Resources Division, 288pp.
- Poey, F., 1860., Memorias sobra la historia natural de la Isla de Cuba, acompañadas de sumarios Latinos y extractos en Francés. Tomo 2. La Habana., Mem. Hist. Nat. Cuba, 2:97-336.
- Van der Heiden , A. M. and Findley, L. T., 1988., Lista de los peces marinos del sur de Sinaloa, México., Anales del Centro de Ciencias del Mar y Limnologia de la Universidad Autonoma Nacional de Mexico, 15:209-224.
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Phylum Chordata 
Class Chondrichthyes 
The Fish Database of Taiwan
FishBase
Discover Life
World Register of Marine Species 
