Mr Flip is at home with a cold, so Mr Quick the batfish visits Reef School to give the little Reefies a swimming lesson. But Chips the pufferfish thinks his fins are too tiny to be a good swimmer.

It's Ray's little sister's first day in the Reefling nursery and he's worried that she'll be lonely. Mr Flip tells him a special story about a hammerhead shark looking for a friend.