what's a nudibranch? here's the answer, it might surprise you!

www.divegallery.com/morebran.htm

Nudibranch which means ‘naked gill’. There are over 11,000 different kinds of nudibranchs all over the world.

The Tubercular nudibranchs possess a most unusual form of protection. Most species feed on various hydroids and other cnidarians. They are able to ingest the stinging cells (nematocysts) of their prey without firing them. The nematocysts are then incorporated into their own tissue. Thus, the tips of the finger-like projections covering their back, are armed with stolen weapons.

Some nudibranchs in tropical waters feed on corals (Phylum Cnidaria), which contain photosynthetic single-celled algal symbionts called zooxanthellae. These nudibranchs are able to remove the algae intact from the coral's tissues and store them in their cerata, where the algae photosynthesize and provide the host nudibranch with a continuous supply of manufactured sugars.

All seven of these stamps (not pictured here) from Mozambique, issued as part of "The World of the Sea" series have images that were pirated directly from my web site! Apparently the government of Mozambique does not respect copyright laws

A nudibranch is a type of sea slug, somewhat like a snail without a shell. It breathes through long, feathery projections (cerata) on its back

http://slugsite.tierranet.com/

Roboastra tigris is a voracious predator, It will survive well in an aquarium on a steady diet of other nudibranchs