In order to see this content you need to have both Javascript enabled and Flash installed. Visit BBC Webwise for full instructions

Blue shark

There are nearly 30 species of shark found in UK waters, but the blue shark is certainly one of the most impressive.

With the white underbelly contrasting with its cobalt blue upper body, it's easy to see where this nomadic shark got its name from.

They normally grow up to an average size of 230cm long, however in 2005 a Welsh record was set 25 miles off the coast of Milford Haven, when a fisherman hauled in a blue shark measuring a massive 271cm.

Here they feed on other fish, such as mackerel, herring, squid and some bottom living species and scavenge on other creatures.

That's why WWF Cymru has joined forces with the UK Shark Tagging Programme in the first 'Angler driven' project in the UK.

Volunteer anglers and charter skippers are being asked to record information about the length, weight, sex, condition and location of any shark they catch, before tagging and releasing them. The tag is individually numbered thus making each shark unique.

Any tagged sharks that are subsequently recaptured can provide clues as to their migration patterns and abundance.

Weatherman walks

Derek Brockway

Have a go

Try one of the walks from Derek's latest walking series on BBC One Wales.


Toads by Brian Stone

In your garden

Find out about the wildlife you can find on your doorstep.

Weird wildlife

A fin whale

Wildlife photos

A gallery featuring rare and unusual wildlife sightings in Wales.

Wildlife map of Wales

BBC Wales Nature map

Explore Wales

Zoom in and discover wildlife in your area with our interactive map.

BBC © 2014 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.