Sperm Whale (Physeter macrocephalus) in the wild — Catch'Um species field guide

Sperm Whale (Physeter macrocephalus) wildlife photograph

Overview

Sperm whales are the largest toothed whales, built around a massive head filled with spermaceti oil used in echolocation. They dive thousands of metres for squid and live in matrilineal social groups.

For United States, Australia, and United Kingdom collectors, a sperm whale blow offshore is a rare deep-ocean link to coasts that still see these giants.

Scientific namePhyseter macrocephalus
LengthFemales ~11 m; males ~16 m (rarely larger)
WeightFemales ~15–20 tonnes; males ~35–50 tonnes
LifespanAround 60–70 years in the wild
DietPrimarily deep-sea squid
ConservationVulnerable
RegionDeep Ocean

Habitat

Deep ocean
Continental slope
Submarine canyons

Deep oceans worldwide, especially along continental slopes and canyons where squid are abundant; mothers and calves favour productive temperate and tropical waters.

Countries found

Field notes

Field scale for the Sperm Whale: length around Females ~11 m; males ~16 m (rarely larger); weight Females ~15-20 tonnes; males ~35-50 tonnes. Typical lifespan: Around 60-70 years in the wild.

When you are scanning habitat, prioritise deep ocean, continental slope, and submarine canyons. Those settings are where a clean look and a usable photo are most likely.

Quick ID anchor: Huge squared head (about one-third of body length), wrinkled dark skin, and a single blowhole set far left. Confirm with behaviour and habitat before you log the discovery.

Diet

Primarily deep-sea squid, plus fish and occasional other cephalopods.

Locate prey with intense echolocation clicks in dark midwater.

Behaviour

Females and young form stable social units; adult males roam widely.

Surface with a distinctive angled blow, then fluke up before long dives.

How to identify

Huge squared head (about one-third of body length), wrinkled dark skin, and a single blowhole set far left.

Bushy forward-angled spout; small dorsal hump rather than a tall fin.

Interesting facts

01
Largest toothed predator on Earth.
02
Can dive over 1,000 m and stay down for an hour or more.
03
Massive head holds the spermaceti organ used in echolocation.
04
Hunt giant and other deep-sea squid in darkness.
05
Skin often scarred by squid suckers and rival whales.
06
Social units of related females raise calves together.

Conservation status

VU: Vulnerable

Sperm whales are Vulnerable. Historic whaling cut numbers sharply; ship strikes, entanglement, and ocean noise still threaten recovery. International protection and quieter seas matter.

Sources: IUCN Red List