Aplacophora
Ormer, found off the Scilly and Channel Isles.
Abalone is an edible marine mollusk that begins with the letter A. It is a type of sea snail commonly found along coastal waters.
oyster
Scallop.
An avalone is an obsolete name for an abalone, an edible mollusc of the genus Haliotis, with a shell lined with mother-of-pearl.
Ormer
Portabello!
A black abalone is a black-shelled edible mollusc, Latin name Haliotis crachedorii, found off the North American Pacific coast.
abalone
Allium cepa, the botanical name for the Onion
Snails are a marine mollusk. They begin with the letter S.
Mollusc is the scientific name. There are many different molluscs, each with a different scientific name.[In the US, the spelling mollusk is used.]