Formerly known as St Peter Fish, because of the dark blotches on the sides of the fish, which are supposed to represent the imprint of St Peter's thumb made as he took a piece of money from the fish's mouth. John Dory are found around southern Australia, mainly along the central and southern coast of New South Wales. John Dory are a trawled fish found at depths up to 100 metres. They are abundant in late summer to autumn and reach a maximum size of 65cm and 3kg in weight.