Shorefishes of the Greater Caribbean online information system

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Species: Sphyrna media, Scoophead shark, the Scoophead

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hammer = angular mallet, + center notch
snout length ~ 1/3 hammer width
teeth smooth, top = oblique blades, bottom straight
A: rear edge concave

Sphyrna media Springer, 1940

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 length before mouth usually ~ 1/3 of head width; only a short groove in front of nostril; mouth broadly arched;  teeth smooth, lower teeth straight, upper teeth are oblique blades, deeply notched on rear side, rear teeth like front teeth; five gill slits, last one over pectoral; first dorsal fin moderately large and erect, its rear margin noticeably concave, its free rear tip reaching over or behind the pelvic fin origin; 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; fins unmarked.

Attains 150 cm.

A coastal species, demersal over soft bottoms.

Depth: 0 -100 m.

E Pacific and W Atlantic; Panama  to Brazil.


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Salinity
  • Marine
  • Brackish
Inshore/Offshore
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Bottom only
Habitat
  • Soft bottom only
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Estuary
  • Mud
  • Sand & gravel
FishBase Habitat
  • Demersal
Feeding Group
  • Carnivore
  • Data
Diet
  • Pelagic crustacea
  • Octopus/squid/cuttlefish
  • Mobile benthic crustacea (shrimps/crabs)
  • Sharks/rays
  • Bony fishes
Egg Type
  • Live birth
  • No pelagic larva
  • Data
Global Endemism
  • New world (East Pacific + West Atlantic)
  • Transisthmian (East Pacific + Atlantic of Central America)
  • Circumtropical ( Indian + Pacific + Atlantic Oceans)
  • Greater Caribbean non-endemic
Regional Endemism
  • Continent
  • GC non-endemic
  • Continent + Island (s)
  • Extends N + S of GC
  • Extends North of GC
  • Island (s)
  • Extends South of GC
  • Also in Brazil
Residency
  • Resident
Climate Zone
  • Subtropical (23-35N, Florida / Carolinas / Bermuda)
  • Tropical (10-23N, Nicaragua / Cuba)
  • Equatorial (0-10N, Costa Rica / Venezuela)
  • Temperate (>35N)
IUCN Red List
  • Data deficient
  • Listed
CITES
  • Not listed
Depth Range Min
  • 0
Depth Range Max
  • 100
Length Max
  • 150