The underwater cave is dark and rocky. Inside the cave fish and tadpoles have taken over. The water is cold, no light gets in. Once inside, a rocky outcrop allows swimmers to come up for air.
Underwater Cave, Cave
swimmer
fish
I love swimming in the river with the other fish. Mostly I spend my days looking for smaller fish to eat. When people cast lines into the river, we all swim away from them and hide. Sometimes one of the other fish gets confused and bites down on the lures.
Like me!  I'm a fish! That you are and what a colorful fish! I can do some fancy swimming too!  Look at me go! I like to think I am pretty good myself, I did manage to get down here afterall. Yes, you are for a giant!  We usually don't get too many visitors here.  Only the occasional troll. Well I am just a human who longs to be a fish. And I am a fish who longs to be human!  Want to trade places? How would we do such a thing? Do you know of any wizards? I cannot say that I do, all of my friends are also into exploring the oceans. What about a witch?  If they can tun things into newts, surely they can turn people into other animals or beings. I don't see why they couldn't, maybe we should seek one out?