Giant Stingray Caught In Thailand, Possibly The World'S Largest Freshwater Fish

Scientists in Thailand caught a giant freshwater stingray. The fish is possibly the world's largest freshwater fish. The stingray is known for its venomous spines. The spine is located at the base of the tail , not the tip , a marine biologist says. Rays are part of a group called elasmobranchs. They're closely related to another group within the elasmothranched: the Sharks. "Imagine a body with a bull head. Then imagine a steamroller going over the top of it. "That's how you make a ray". The sawfish's snout is covered with what are called rostral teeth.

The saws are used to good use as weapons and to find other fish. There are five species of sawfish, all listed as endangered or critically endangered. The cownose ray "look like the concrete or marble pieces put together [to] form a pavement," says Burgess. The National Geographic explorer Andrea Marshall found that manta rays have patterns on their underside. .