malformalady:

Abalone, is a common name for any of a group of small to very large edible sea snails, marine gastropod molluscs in the family Haliotidae. Other common names are ear shells, sea ears, and muttonfish or muttonshells in Australia, ormer in Great Britain, perlemoen and venus’s-ears in South Africa, and pāua in New Zealand

Photo credit: Jessy Eykendorp