Sharks are classified as vertebrates in the phylum Chordata. Although their skeletons are made of cartilage rather than hard bone, they are still considered vertebrates. More »

Stingrays are considered to be vertebrates, as they are classified as cartilaginous fish. Other fish classifications that are vertebrates include bony fish and jawless fish. More »

Vertebrates and invertebrates are similar in a lot of ways. Both are multicellular animals that can reproduce. They both also possess appendages, nerve chord, and have their mouth and head at one end plus anus and reprod... More » Science Biology

Because they do not have separate openings for reproduction and excretion, the posterior gut opening in the excretory systems of sharks is called a cloaca rather than an anus. In the digestive systems of sharks, food pas... More »

On average, great white sharks grow to be 15 feet long. Females typically reach a length of about 16 feet, while males reach a length of 11 to 13 feet. More » Pets & Animals Marine Life Sharks

Spiny dogfish sharks live all over the world. They only live in warm waters, generally ranging from seven to 15 degrees, so the distribution of the spiny dogfish shark is limited to the coast. More » Pets & Animals Marine Life Sharks

To survive, great white sharks have evolved several behavioral adaptations, including flexible activity patterns, migratory habits and social hierarchies. However, great white sharks are also intelligent hunters, and the... More »