Michael Phelps throws a 'fishy' bash for his son Boomer

Swimming champ Michael Phelps played the role of a doting dad to the tee on Sunday when he celebrated his son Boomer's first birthday with a shark attack-themed party.

The big bash included a pair of birthday cakes, one being in the shape of a shark emerging out of water with its eyes on a helpless crab. The other, a smaller cake, was decked in blue and white icing to look like churned up water and was topped with the number one.

Phelps posted this picture of his wife Nicole and Boomer. "First bday party for @boomerrphelps!!! What an amazing birthday cake," he captioned the picture.