River sharks and Bull sharks would fit that bill.
assonance
warren brown
to slow if you ask me
the fishes they swam away when he swam with Bella
Nobody, as of yet.
it swam across the ocean
No one swam the Pacific
The nouns salmon and trout are the same in the singular and the plural; for example: A salmon and a trout swam safely away. All of the salmon and all of the trout swam safely away.
Beowulf kills nine monsters as he swims thru the ocean.
They walked across the ocean on the scum left from when the Germans swam here.
massive
The gosling swam away from it's mother.