Sting rays at new jersey zoo
Imagen obtenida durante la realización del proyecto de doctorado de Julieta Maldonado , quien trabaja con la ecología del erizo del mar en el Parque Nacional Arrecifes de Xcalak.
OLYMPUS DIGITAL CAMERA
Rajiformes is one of the four orders in the superorder Batoidea, flattened cartilaginous fishes related to sharks. Rajiforms are distinguished by the presence of greatly enlarged pectoral fins, which reach as far forward as the sides of the head, with a generally flattened body. The undulatory pectoral fin motion diagnostic to this taxon is known as rajiform locomotion. The eyes and spiracles are located on the upper surface of the head and the gill slits are...