These shellfish can be found in Caribbean Sea. They live inside corals
and feed from those (Those are horned corals: Bright coloured and stuck
to sandy grounds whereas regular corals are stuck to hard grounds).
Their approximately 3 cm long shells is covered by orange spots on
black, that they can retract when an animal approaches.
This
shellfish used to be a currency, and be so called in French. It’s a
quite common shellfish but unfortunately picked up too much by divers;
that phenomena threatening this specie.
source : flickr (laszlo-photo), here, here and there
