Sunfish

Scientific Name: 
Mola mola

A bizarre fish, silvery grey in colour, flat and circular, with no noticeable tail and two very large fins, one on each side, which make it look like a giant swimming head! The Sunfish is the heaviest bony fish in the sea and sometimes turns up in British waters after storms out at sea. May also be seen from ferries, 'basking' at the surface of the water on its side. Its mouth is adapted into a beak which is uses to feed on jellyfish.

How to identify: 
Unmistakeable.
Where to find it: 
A rare visitor to southern and western parts of the UK, particularly after westerly storms.
How people can help: 

Although not commercially important, Sunfish are a product of bycatch and as a result are under threat from fishing activities. The Wildlife Trusts are working with fishermen, researchers, politicians and local people towards a vision of 'Living Seas', where marine wildlife thrives. This work has recently had a massive boost with the passing of the Marine Bill, promising sustainable development of the UK's marine environment. Do your bit for our Living Seas by supporting your local Wildlife Trust.

Statistics: 
Length: up to 4m Weight: up to 2.3 tonnes Average Lifespan: up to 10 years
Conservation status: 
Common.
Did you know?: 
Although it looks like it might be dying, the Sunfish regularly lies at the surface on its side in what appears to be a form of sunbathing. It is thought that it might be regulating its temperature after diving to cooler waters at depths of up to 150 metres during the day, possibly to catch prey. It inhabits warmer water at night, at depths of up to 50 metres. Lying on its side has the added bonus of allowing gulls to land and pick off unwanted parasites.
Seasons: 
Spring
Summer
Autumn
When to see
Start date: 
June
End date: 
August
Image: