Hidden Currents of Room 5

Swirl

In a room where echoes dance, do fish wear pants?
In water, we trust, in tides, we must.

What's that? Another riddle! Who tickles the turtle? Where's the mackerel masquerade?

Swirl, swirl, swirl! The fishy whirl, the fishy whirl, repeat, repeat! Am I fish? Am I not?