Keiko, whose name means "Lucky One" in Japanese, starred in three Free Willy films, in which a young boy befriends a killer whale and encourages him to jump over an aquarium wall to ocean freedom.

BBC: NEWS | Entertainment | Keiko the 'Free Willy' whale dies

Two southern stingrays were born in a tropical ocean display at the Blue Reef Aquarium in Newquay.

BBC: RELATED BBC SITES

Late last year Whole Foods Market color coded all of its wild-caught fish to show consumers which are most sustainable, based on guidelines set by Monterey Bay Aquarium in California and New York's Blue Ocean Institute.

WSJ: Guidelines for Eating Sustainable Seafood

At first it looks more like a fat white and yellow fish swimming through a green sun-speckled ocean, as if it and the tree and the grass were occupants of a fantastical aquarium.

ECONOMIST: Leon Kossoff