Strombus alatus
The Florida Fighting Conch is named after its pear- shaped operculum. An operculum is the snail's door that closes for protection. When the snail extends its foot to move around, the operculum extends out and appears to be a sword.
Since they only eat algae, this greatly helps the sea grasses where they live, as unchecked algae can smother sea grass and kill it.
Fighting Conchs come in many colors and sizes. Younger shells are smoother, and the older ones have larger bumps and spikes.
Be careful when collecting these shells, as the live animal can hide deep inside the shell.
Live shells should never be taken from any Florida State Park.