Myliobatiformes is one of the four orders of batoids, cartilaginous fishes related to sharks. They were formerly included in the order Rajiformes, but more recent phylogenetic studies have shown the myliobatiforms to be a monophyletic group, and its more derived members evolved their highly flattened shapes independently of the skates.

Myliobatiformes. Retrieved May, 08 2021, from en.wikipedia.org/wiki/Myliobatiformes.

The eagle rays are a group of cartilaginous fishes in the family Myliobatidae, consisting mostly of large species living in the open ocean rather than on the sea bottom.

Eagle rays feed on mollusks and crustaceans, crushing their shells with their flattened teeth. They are excellent swimmers and are able to breach the water up to several metres above the surface. Compared with other rays, they have long tails, and well-defined, rhomboidal bodies. They are ovoviviparous, giving birth to up to six young at a time. They range from 0. 48 to 5. 1 m (1. 6 to 16. 7 ft) in length and 7 m (23 ft) in wingspan (Mobula birostris).

Myliobatidae. Retrieved May, 08 2021, from en.wikipedia.org/wiki/Eagle_ray.