1x30 - Tom and Jerry Tales

Tom and Jerry are on a raft sailing towards an island in search of treasure. Tom traps Jerry and decides jump into the freezing water to retrieve the treasure. However, Jerry has earned the friendship of a baby dolphin that is able to save him and defeat Tom. Near the end of the episode, the mother dolphin appears and scares away Tom. They retrieve the chest back onto the raft, but Tom doesn't get any gold.