Copying this answer here
What if I don't want to write about underwater places but prefer to use sea monsters and such instead?
Well, that's a hard question. Ideally, the story should take place in some kind of body of water but! if underwater creatures are important to the whole project, that's also allowed even if the characters spend time mostly on land. Or in space. Or anywhere else, really.
So if your story revolves about the experience of fishing, maybe what it means to fish to the player chara and it's really obvious how fishing is important to the narrative, it would still fit. I'm assuming here you don't mean something akin to fishing minigames where that's the whole point but there's simply no story to tell, though.