2. I'm also looking for a specific story, where Clint and Coulson are being dragged underwater to a submarine by Tony. The bad guy they're going after is, I think, gathering all the sea creatures to tip the boat the other Avengers are on, because he thinks he's king of the seas, and Clint is hacked off because he can't shoot at the fish but one of the others is. It's part of a longer story, but I have no idea what else is happening in it.
ETA: Found by tamnation, it's A House Is Not A Home but infiniteeight