The Tritons Trumpets, Charonia variegata, are medium to large sized gastropods that can be fairly aggressive feeders. They can grow to over a foot long, and will aggressively feed on starfish, sea cucumbers, and sea urchins, as well as bits for fish or clams that you may add to the tank. If they are hungry they may even attack other snails, so they arent for most reef tanks. Starfish such as brittle stars and serpents stars seem to do better because they are quick enough to get away, but any other slow moving echinoderm is at risk when these are around.
They are however a really pretty snail and are easy to care for. The average size we sell is about 3, but we occasionally get smaller or larger ones