n. A carangoid fish, Vomer sctipinnis: so named from the roundness and silvery color of the young. Also called moonfish (which see).n. A stromatoid fish, Stromateus triacanthus: so named from its round form and silvery color. Also called butter-fish and harvest-fish. See cut under butter-fish.n. A flat, disk-shaped echinoderm, Echinarachnius parma, found along the Atlantic coast. Also known as cake-urchin and sand-dollar.n. The John-dory, Zeus australis: so called from the mark on its side.