The Golden Lace Nudibranch Is Like A Snail Without A Shell
On land, we think of slugs as basically snails that do not have a shell. But this underwater anomaly, the golden lace nudibranch, is a type of mollusk that has a shell early in life but then sheds it. So it is basically like the part of a mussel that you eat, but it lives most of its life without the hard armor that the shell of a mussel provides.

So, in other words, nudibranch mollusks are nude. They live in Hawaii at relatively shallow depths, about 30 feet underwater. They are also quite small, maxing out at about five centimeters in length. Despite their small size, they are carnivores that feed on soft organisms, such as sea sponges.