A very large and gerontic shell of the Florida Horseconch, Triplofusus giganteus, at the Texas State Aquarium, Corpus Christi, Texas. My daughter was quite young and small then, so the shell looks enormous.

I don't think this shell is stil on display at the TSA, but I have seen other large shells of this species there recently.

There was no indication as to the provenance of this shell, but it is a common species in Texas. Large specimens are difficult to find now, but small ones are still common.

This is what we call a "Texas micromollusk" :-)