Sorta, kinda, maybe. LOL Thanks for the input. From what I saw when I did a Google search of limpet I suppose it could be but it was more flat on the top side. From what I found on line, it appears most limpets have a peak to the shell near the center. Oh well, I am not going to worry too much because the emerald crab made short work of him. LOL I figure he wouldn't have ate him if it was going to hurt him.