The sponge and oyster fisheries are also important.
That of the common oyster was described by Hoek.
Whitstable has been famous for its oyster beds from time immemorial.
The oyster beds, for which Loch Ryan was once noted, are not cultivated, but the fisheries (white fish and herrings) are still of some consequence.
One of the oldest of Venezuelan industries, the Margarita pearl fisheries, was prohibited in 1909 for an indefinite time because of the threatened extinction of the oyster beds.