Conservation push yields results for UK sea life but challenges remain

Wildlife Trusts report comeback of rare seahorse breed and nudibranch slugs but plastic pollution still poses grave risk

A rare kind of seahorse and a rainbow-coloured sea slug with a titillating name are among the creatures making a comeback in UK waters, according to an annual conservation review.

The coast around Britain is now home to more than 100 species of nudibranchs - brightly hued, soft-bodied marine molluscs that appear nude because of their lack of external shells. The Wildlife Trusts credited a big conservation push around the coast for their proliferation.