I believe they are a type of cowrie.....a type of snail....very colorful. I've never seen them in the hobby but I'm sure a google search could provide additional info.
Here is a bit of info I was able to locate via google:
Cyphoma gibbosum ...Flamingo tongue
Taxonomic Information
Class GASTROPODA ORTHOGASTROPODA
Order CAENOGASTROPODA - SORBEOCONCHA - HYPSOGASTROPODA - LITTORINIMORPHA
SuperFamily CYPRAEOIDEA
Family OVULIDAE OVULINAE OVULINI
along with a couple of photos for those that are curious about what they look like:
Originally Posted by Dogstar Cyphoma gibbosum, , , , , , Phylum Mollusks, Class Gastropoda, Subclass Prosobranchia, Superfamily Cypraecea, Family Ovulidae, Order Mesogastropoda,
Yea, what he said.
In that pic it looks like it eating the Gorgonia (if that is what it is) so am I right in assuming they are not reef safe? It's definately a cool looking critter.