Orcinus orca

LENGTH 6–9 m / 18–28 ft

DORSAL FIN Black, triangular in females and calves; tall, distinctive in adult males

APPEARANCE Black body with white underside; grey saddle patch behind dorsal fin; white eye patch BEHAVIOUR Usually in groups of 3–25;

bushy blows visible in cold weather

BEHAVIOUR Usually in groups of 3–25; bushy blows visible in cold weather

Photos by J. Ford and A. Morton. Illustrations by A. Denbigh, not to scale.