Here’s a quick illustration of a clione I did recently. A clione is a type of sea slug commonly known as a sea angel and this species, Clione limacina, is found in arctic waters and is pelagic. These have a VERY peculiar and fascinating anatomy as is described on The Sea Slug Forum:
When C. limacina makes contact with its prey it rapidly everts a set of six buccal cones, which are in fact eversible tentacles, which grab the shell of Spiratella and turn it around until its shell opening is facing the mouth of Clione. At this stage large chitinous hooks are everted from a pair of sacs, called hook sacs, and grasp the prey animal.
