Sphyrna lewini

Scalloped Hammerhead

Opptil 4.3 meter
Opptil 35 år
Kritisk truet
Om

Scalloped Hammerhead

The scalloped hammerhead is perhaps the most iconic of all hammerhead species, famous for forming massive schools of hundreds or even thousands of individuals at seamounts and oceanic islands. Their distinctive scalloped head shape enhances sensory perception, allowing them to detect prey buried in sand. Encounters with schooling hammerheads are among diving's most spectacular experiences.

Størrelse

Opptil 4.3 meter

Vekt

Opptil 150 kg

Levetid

Opptil 35 år

Status

Kritisk truet

Hvor du finner dem

Beste dykkelokasjoner

Kokosøya, Costa RicaGalápagosøyeneMalpelo Island, ColombiaLayang Layang, MalaysiaRødehavet, EgyptRaja Ampat, IndonesiaKomodo, Indonesia

Dykketips

Schooling hammerheads are found at depth (20–40m) near seamounts. Descend quickly, stay close to the reef, and avoid exhaling large bubbles. They are wary of divers — patience and proper positioning are key. Early morning dives offer the largest schools.

Beste sesong

June–November (Cocos Island), year-round at Galápagos

Habitat

Coastal and oceanic waters, congregating around seamounts, oceanic islands, and continental shelves

Kosthold

Fish, squid, octopus, crustaceans, and rays
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Morsomme fakta

1

Schools of over 500 scalloped hammerheads have been documented at Cocos Island

2

Their wide head acts like a metal detector, sensing electrical fields of buried prey

3

They are one of the few shark species that school in large numbers

4

Populations have declined by over 80% in recent decades due to the shark fin trade

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