Harbour porpoise

Phocoena phocoena
​LENGTH Less than 2 m / 6 ft DORSAL FIN Dark, triangular

DORSAL FIN Dark, triangular

APPEARANCE Dark grey back with lighter underside

BEHAVIOUR Inconspicuous, travels slowly; generally alone or in groups of 2–3

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