Yellow slug

When I first saw these Yellow slugs Limax flavus, in my garden a few years ago I got all excited thinking it was a Leopard slug, but sadly not. This lemon slug is common,and widespread in England, Wales and Ireland and can cause major damage to seedlings and vegetables.
It is quite large (up to 10cm in length) and is a marbled and mottled olive colour with very distinctive steely blue tentacles.
Not everyone's cup of tea I know, but I think rather interesting.