Cast metal versions of organic forms can look awesome, like this seashell that Seth Robinson made. The process involved placing a marlin spike shell into a sand mold. After melting aluminum and pouring it into the mold, he removed the casting and cleaned up the excess metal to reveal what the insides of the shell look like.
For those of us with an allergy, there are bigger fish to fry than eating raw or undercooked shellfish. But for everyone else, Dirty Coast and the Louisiana Shuckers Association suggest that you ignore that menu warning and dig in to enjoy all the raw oysters you can handle.