[stuny]

Nudibranchs (or “nudies” as divers usually refer to them) are shell-less sea snails. Similar to nudies are flatworms, but nudies always have antenna and gills, things not visible on flatworms. Over 4,000 species have been identified, and more are found every day. They range in size from a half a centimeter to about 20 centimeters, but most of the ones we saw were in the 2 to 5 centimeter range. Their bright colors are a warning to fish that they contain poison. During our Borneo trip (we’re back just one week) I photographed about 50 species. Here’s a first assortment, with more to come.