A small colourful sea slug that can be found grazing on sea mats on the rocky shore and beyond the low water mark.

The herring gull is the typical 'seagull' of our seaside resorts, though our coastal populations have declined in recent decades.

The thresher shark is a migratory species and passes through UK waters in the summer months. If you’re lucky, you might see this magnificent shark jump high out of the water in to the air.

Sand eels are a hugely important part of our marine ecosystem. In fact, the fledgling success of our breeding seabirds entirely depends on them.

The largest of the UK wrasse species, the ballan wrasse with its striking patterning is a delight for any rocky reef snorkeller or shallow water diver!