Drysdale wants to get the Clampetts interested in deep sea fishing. Jed has been disappointed that there's no good hunting in Beverly Hills. Drysdale and Miss Jane bring them a taxidermied trophy fish to mount on the wall. Granny tries cooking the fish. Because of Granny's fear of boats, the Clampetts go fishing on the bridge that goes over the Los Angeles River. At the bank, Drysdale tells Granny and Jed that he has chartered a boat for them. Granny's fear of boats only temporarily thwarts Drysdale's plan to take the Clampetts deep sea fishing. He wants to take them to Marineland to see the types of fish they could catch in the ocean. They want to save Drysdale the trip and go to Marineland by themselves. Thinking that they're large fishing holes, Granny wants to "catch the whale". The family is stunned when they see how big a whale really is. Granny still wants to get one. Elly wants to take a walrus home, but Jed stops her. Elly does sneak a baby seal home.