You can press A again once you’re in the water to swim around and press Y to pick up any critters you find.

You’ll be able to find critters like Starfish and Oyster, along with Scallops.

These critters can be donated to the fish section of the Museum and have their own Critterpedia page on your Nook Phone.

Like fish and bugs, certain sea critters only appear during certain seasons and times of the day.