Why would a University of Washington oceanographer travel 13 hours - one way - to collect a buoy? Here’s what you need to know about the trash that’s piling up on Pacific Northwest beaches and around the world’s oceans: http://bit.ly/2jCAxjX | Cascade PBS

Ocean parents must master dedication and intelligence to raise their young. In Australia, an orca mother teaches her young how to hunt blue whales, while in Indonesia, a Banggai cardinalfish protects his young inside his mouth. | Cascade PBS

What will happen when a mother humpback and her calf are caught between the advances of competing male whales? Find out on the season finale of Spy in the Ocean: Deep Trouble, tonight at 8 PM and on the Cascade PBS app! | Cascade PBS