Where are scalloped hammerheads found?

They occur in warm, temperate, and tropical coastal waters globally between approximately 46°N and 36°S, and to depths around 500 m (1,600 ft).

What is distinctive about their appearance?

They have a scalloped, hammer-shaped head (cephalofoil) with eyes and nostrils at the tips of the lateral extensions.

Are scalloped hammerheads large sharks?

They are a fairly large hammerhead species but are smaller than the great and smooth hammerheads.

What other names do they have?

They are also called the bronze, kinky-headed, or southern hammerhead; the species was originally named Zygaena lewini.

What family do they belong to?

They belong to the hammerhead shark family, Sphyrnidae.

How common are scalloped hammerheads among hammerheads?

They are described as the most common of all hammerhead species.

How deep do they occur?

They have been reported down to about 500 m (1,600 ft).

What latitudinal range do they occupy?

They occur between approximately 46°N and 36°S.

Saltwater Fishes

Scalloped Hammerhead

Sphyrna lewini

A medium-to-large hammerhead shark with a distinct scalloped head, found in warm coastal waters worldwide.

Zygaena lewinibronze hammerheadkinky-headed hammerheadsouthern hammerhead

Last Updated Mar 9, 2026 · 3 sources

Species Guide

What to know about scalloped hammerheads

A clean field guide focused on habitat, identification, behavior, and conservation context without burying the useful parts.

The scalloped hammerhead (Sphyrna lewini) is a species of hammerhead shark in the family Sphyrnidae. Its most distinguishing feature is the scalloped, hammer-shaped head (cephalofoil), with the eyes and nostrils positioned at the tips of the lateral extensions. It was originally described as Zygaena lewini. This species inhabits warm, temperate, and tropical coastal waters worldwide between about 46°N and 36°S and can be found down to depths of roughly 500 m (1,600 ft). It is reported as the most common of the hammerhead sharks and is smaller than the great and smooth hammerheads.

The strongest linked planning options currently surface around destinations such as Fuvahmulah, Galapagos Islands, Puerto Princesa + Tubbataha Gateway (Palawan) and countries such as Costa Rica, Maldives, Ecuador for divers building trips around scalloped hammerheads.

Identification

How to identify scalloped hammerheads

The visual markers divers can use underwater, plus the species most likely to cause confusion.

Key identification markers

Cephalofoil shape

Distinct scalloped, hammer-shaped head (cephalofoil) that gives the species its common name.

Eyes and nostrils placement

Eyes and nostrils are located at the tips of the lateral extensions of the head.

Relative size

Fairly large for a hammerhead species, but smaller than the great and smooth hammerheads.

Common lookalikes

Great hammerhead (larger)

Larger hammerhead species; scalloped hammerhead is smaller in comparison.

Smooth hammerhead (larger)

Another larger hammerhead species; differs in head shape and size.

Responsible Encounters

How to dive with scalloped hammerheads

Conservation-minded guidance for divers who want the encounter without adding pressure.

Give scalloped hammerhead space, avoid blocking the animal's path, and follow local site and operator rules for wildlife interactions with saltwater fishes.

Field Notes