The two of them in turn form a clade with other angel sharks found in the Americas.
Like other angel sharks, the sand devil is viviparous with the developing embryos sustained by yolk.
As in all angel sharks, it has a flattened body with greatly enlarged pectoral and pelvic fins.
Locally, this species may also be referred to as angel shark, California angel shark, or monkfish.
For the choice of the fish, many species are used such as grouper (threatened species), angel shark, tuna or mackerel.
It is the only species of angel shark known to occur in the Philippines.
Familiar examples of ovoviviparous fish include guppies, angel sharks, and coelacanths.
They have a caudal fin (tail) with the lower lobe being much longer in length than the upper, and are commonly referred to as angel sharks.
ICES has called for an end to the fishing of common skate and for angel sharks to be given the highest possible protection.
While the forward part of the angel shark's body is broad and flattened, the rear part retains a muscular appearance more typical of other sharks.