Authorities are working to combat wildlife trafficking across the world, and officials in Mexico have made a "historic bust." ...

Silky sharks are a shark that lives throughout many parts of the ocean, most commonly seen along continental shelves. They sharks hunt tuna, squid, porcupine fish, crabs, and more.

Divers filmed hundreds of silky sharks circling at marine wildlife refuge off São Paulo. Purpose of the aggregation is unknown, study said.

Despite the fear they may inspire in humans, sharks have far more reason to fear us. Nearly one-third of sharks are threatened with extinction globally, mostly as a result of fishing.

Divers filmed hundreds of silky sharks circling at marine wildlife refuge off São Paulo. Purpose of the aggregation is unknown, study said.

Nearly one-third of sharks are threatened with extinction, mostly due to fishing. While mandated releases are helpful, researchers discovered that they aren't enough to stabilize shark populations.

Divers filmed hundreds of silky sharks circling at marine wildlife refuge off São Paulo. Purpose of the aggregation is unknown, study said.

Divers filmed hundreds of silky sharks circling at marine wildlife refuge off São Paulo. Purpose of the aggregation is unknown, study said.

Divers filmed hundreds of silky sharks circling at marine wildlife refuge off São Paulo. Purpose of the aggregation is unknown, study said.

Divers filmed hundreds of silky sharks circling at marine wildlife refuge off São Paulo. Purpose of the aggregation is unknown, study said.

Divers filmed hundreds of silky sharks circling at marine wildlife refuge off São Paulo. Purpose of the aggregation is unknown, study said.

Divers filmed hundreds of silky sharks circling at marine wildlife refuge off São Paulo. Purpose of the aggregation is unknown, study said.