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| Common names: scoophead (English), shark (English), tiburón (Espanol) |
Sphyrna media Springer, 1940
Scoophead, Scoophead shark
A hammerhead shark with moderately broad, but short mallet-shaped side extensions of head (width of hammer 22-33% of TL); front margin of head broadly arched with very shallow lateral and central indentations; snout moderately long (length before mouth usually ~ 1/3 of head width); mouth broadly arched; front teeth blade-like, smooth, lower teeth straight, upper teeth oblique, deeply notched on rear side; rear teeth like front teeth; first dorsal fin moderately large and erect, its rear margin noticeably concave; second dorsal fin base about half length of anal fin base; origin of second dorsal fin above middle of anal fin; rear margin of anal fin strongly concave; transverse pit above tail base crescent shaped, a pit below tail base; tail fin strongly asymmetrical, notched under tip of top lobe, large lower lobe.
Grey brown on back and sides, lighter on under surfaces.
Reported to attain 150 cm; size at birth 30-35 cm.
A coastal species, demersal over soft bottoms.
Depth: 0-100 m?
Western Atlantic and eastern Pacific (Lower Gulf of California to Peru, rarely at Malpelo).