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

This seagrass species is a kind of flowering plant that lives beneath the sea, providing an important habitat for many rare and wonderful species.

Listen out for the 'chattering' song of the reed warbler, while wandering the UK's lowland wetlands in summer. A small, brown bird, they are quite hard to see.

The sea hare looks like a sea slug – but in fact has an internal shell. They can be up to 20cm long but are usually much shorter.

The shanny is a common sight in rockpools all around the UK. They are feisty little fish and have been known to bite when caught, so watch your fingers!

One of the only venomous fish to be found in British waters, the lesser weever fish is certainly one to watch out for!

Look out for the swift-like shape of the hobby as it darts over heathlands and wetlands in summer. They are keen hunters, chasing and catching fast-flying dragonflies and small birds on the wing…