I got this from another site. It says Cocoa and Striker died in August 1996. In 1997, the show continued with Misty and Breeze. During the winter of 1998, however, Misty died. Cedar Point then announced the closing of Oceana, with Breeze being sent to Florida for a much-deserved retirement.
There were also two sealions. A new one replaced Skipper in 1997. I'd put the name of the website, but I don't exactly understand the rules of spamming and such and I don't want to make Jeff and Walt mad.