Fishing tale with a twist

There was something fishy about Fred.
And it wasn’t just that Fred was a fish.
First, Fred developed a fondness for hot cacciatore sausage.
That led him to flee his palatial pond and follow an angler to his abode.
Gradually, Fred learned to survive on air, a fish out of water.
Converted to a landlubber, he hardly ever had to take the plunge. Sounds bass-ackwards, but it’s true.
But Fred always kept one wall-eye open for a fellow pond-dweller that blub-blubbed with a Russian accent.
A