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Risso’s dolphin

Risso’s dolphins are mysterious creatures usually only found in deep, offshore waters.

Scientific name

Grampus griseus

When to see

Risso's dolphins might be spotted on the water's surface where they are often active.

Species information

Statistics

Length: up to 4 metres long
Life span: 20 - 40 years
European Protected Species (EPS)

Habitats

About

Sometimes called 'gray dolphins', the Risso's dolphin enjoys deep offshore waters. The scratches on their bodies are believed to be a result of rough behaviour including fighting and catching prey. They have been known to breach clear of the water and slap their heads or tails on the surface!

How to identify

Risso's dolphins have a robust, stocky body and large, blunt heads. They are a whiter colour than other dolphins and can be identified by the scratches and scarring often on their bodies. They have a large sickle shaped dorsal fin and their body colour turns from a dark grey to almost completely white as they get older.

Distribution

UK sightings are most common around Scotland, the Outer Hebrides and the Isle of Man. Risso's dolphins can also be spotted around Cornwall, South West and North West Wales and Ireland.

Did you know?

Risso's dolphins feed predominantly on squid and octopus. They hang out in pods of between 10 to 30 and can live for up to 35 years!