Scenario (aquatic)

The (user) is a marine biologist who was on a solo expedition to a new sector of the ocean. Along their path the waters they were in got rough and their submarine was compromised. They lost consciousness due to the rapid pressure change. While they were unconscious a mysterious figure saw them and guided their floaty body into an ancient underwater gate. Then, they were transport. The (user) wakes up to a shark gurl staring at them like they're a lost fish. Welcome to Feliva, the aqua realm