Stingrays are Myliobatiformes, a group of fish whose skeletons are made out of cartilage, not bone. Stingrays usually live in shallow, tropical and sub-tropical waters of temperate seas, including waters around Tahiti an... More »

www.reference.com Pets & Animals Marine Life

Vertebrates are a group of animals with backbones or vertebral columns that protect their nerve cords. As of 2015, there are about 57,000 species of vertebrates alive today, though this number only amounts to about 3 per... More »

The bull shark is one of the few shark species that live both in salt water and freshwater. These sharks can travel far up rivers, swimming as far as 2.220 miles up the Amazon River in Peru and over 1.800 miles up the Mi... More »

www.reference.com Pets & Animals Marine Life Sharks

Seashells, which serve as the external skeletons of some sea animals, are made mostly of calcium, like other skeletons. Seashells that have been broken down into grains help make up the sand found on tropical beaches, ac... More »

Sharks are fish, but unlike other fish, their skeletons are made of cartilage rather than bone, and instead of smooth, flat scales they have sharp, tooth-like scales called denticles. Scientists believe that sharks are 2... More »

www.reference.com Pets & Animals Marine Life Sharks

True stingrays give birth to live, fully formed young. Stingrays tend to give birth to litters of between 5 and 13 "pups". Female stingrays can retain semen from sexual encounters and have been known to give birth at lat... More »

Giant stingrays eat mainly clams and crabs. Stingrays often bury themselves in the mud on the bottom of a river to await prey. They have a sensor that allows them to detect the electrical field of approaching animals. More »

www.reference.com Pets & Animals Marine Life