1) Family rajidae 2) Fish family 
(from the article `skate`) ...are found in most parts of the world, from tropical to near-Arctic waters and from the shallows to depths of more than 2,700 metres (8,900 feet). ... ...and cow-nosed rays (Rhinopteridae) feed on invertebrates, principally mollusks and crustaceans. Whip-tailed rays (Dasyatidae) use their broad ... [2 rel...
[n] - bottom-dwelling tropical rays: skates
family Rajidae noun bottom-dwelling tropical rays: skates