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Sei Whale (Balaenoptera borealis)

Single front blowhole, slightly left

Smooth appearance of the head

Only a low hump instead of fin

Visible bumps between hump and tail

Visible bumps between hump and tail

Visible bumps between hump and tail

Very large, square‑shaped head

Pale underslung jaw

Small flippers shaped like spatulas

Grey‑brown skin, wrinkled with stripes

  • Length: Largest toothed whale, males reaching about 16 metres

  • Group Size: Females in stable groups; males mostly solitary

  • Key Features: Huge square head, narrow jaw, single blowhole

  • Behaviour: Deep long dives for squid; powerful angled blow

  • Habitat: Deep offshore waters worldwide, especially near submarine canyons

  • Conservation Status: Listed as Vulnerable on the IUCN Red List

Sperm Whale.jpg
Sperm Whale 1.jpg
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