Nudibranchs at Sipadan

Nudibranchs, sometimes known as Sea Slugs, are shell-less sea snails and are found all over the world. There are over 3,000 known varieties and they are generally very colourful. They have external gills and are carnivorous, eating all sorts of marine life. The largest one above was approximately six inches in length, but the usual size is one to two inches.