Smooth skate
The Anacanthobatidae, the smooth skates or leg skates, are a family of skates found at depths below in the Indian, Pacific and Atlantic Oceans.
They lack the dorsal denticles of other rays, hence their name, from Greek an- meaning "without", acantha meaning "thorn", and bathys meaning "deep".
They are bottom-dwelling fishes found on the continental slopes of tropical and subtropical waters.