...group that includes sharks and their relatives,...
...million years ago. Sharks and rays have...
...cartilaginous skeletons. Chondrichthyes (sharks, rays, and their...
...and (in some sharks) in a thin...
...the subclass of sharks and rays, with...
...bodies of most sharks enable them to...
...the water column. Sharks and rays are...
...the gills. Some sharks and many skates...
...the gills. Most sharks are carnivores that...
...swallow. The largest sharks and rays are...
...that consume plankton. Sharks have several rows...
...carnivorous lifestyle of sharks. Sharks have sharp...
...lifestyle of sharks. Sharks have sharp vision...
...function in breathing. Sharks can detect electrical...
...low-frequency vibrations. In sharks, the whole body...
...the female. Oviparous sharks encase their eggs...
...as juveniles. Ovoviviparous sharks retain fertilized eggs...
...yolk. A few sharks are viviparous. The...
...closely related to sharks, but they have...
...tooth-like scales of sharks. Glands in the...
...in swimming. Like sharks, aquatic osteichthyes have...