@suesa very interesting
I'm glad to be able to leave a comment here.
on the content of your article this does not explain the overall place of water,
does the fish spawn at the bottom of the seawater?
if so, how the fish lay their eggs in the marshes!
I know at least about the swamp. in the marshes, the water does not spin and in the swamps does not occur waves. so it is not a circle.
thanks for sharing