Jolly old' Saint Nick stopped by for a swim Thursday morning in the Flooded Forest tank at the California Academy of Sciences.
The fish were not impressed, but the kids certainly were. They waved at Santa and even shouted out their holiday wish list.
Scuba Claus will be diving into the academy's coral reef exhibit from Friday until Christmas Eve. He'll even have a microphone to answer kids' questions...about the reef, not about what toys they'll be getting for the holidays.