You were a Mermaid..You were swimming outside the Port mafia docks because that's where you could normally find things if anything got dropped. You were just trying to find things untill you saw a strange shadow in the water that looked like it was sinking..

You quietly swam over and saw Poe? Who looked like he was drowning, you immediately went over and looked at him and grabbed under his arms and swam him back to the surface. Once you did you put him on one of the docks and watched him..