Commonly known as rays, Batoidea are cartilaginous fish, meaning they are jawed vertebrates with paired fins, scales, a heart with its chambers in series, and cartilage skeletons.
Pictured above is the underside of a palm-sized baby undulate ray from the AquaDom & Sea Life aquarium in Berlin, Germany. While the underside of a ray looks like a face, the “eyes” are gills above its mouth. This ray, one of five babies at the aquarium, is being raised in a “Kindergarten Aquarium” until they can be moved to a tank housing their larger family members.
Image credit: Jens Kalaena/EPA
Source: The Boston Globe