Hammerhead Shark and Similar Species
Sphyrnidae
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Open the appSeveral fish can be confused with Hammerhead Shark. Here are the key differences.
Species often confused with {name}
Great Hammerhead
Sphyrna mokarran
Key differences: Largest hammerhead species (up to 6.1m). Cephalofoil is very broad and nearly straight across the front margin, with a slight indentation in the center. First dorsal fin is very tall and strongly falcate.
Scalloped Hammerhead
Sphyrna lewini
Key differences: Medium to large size (up to 4.3m). Cephalofoil has a distinct central indentation and several smaller indentations along the front margin, giving it a 'scalloped' appearance. First dorsal fin is moderately tall and falcate.
Smooth Hammerhead
Sphyrna zygaena
Key differences: Medium to large size (up to 4m). Cephalofoil is broad and smoothly arched or slightly convex along the front margin, lacking a central indentation. First dorsal fin is moderately tall but less falcate than the Great Hammerhead.
Bonnethead Shark
Sphyrna tiburo
Key differences: Smallest hammerhead species (up to 1.5m). Cephalofoil is shovel-shaped or bonnet-shaped, much narrower and more rounded than other hammerheads. Often found in shallower, estuarine waters.
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