I hurriedly put my flask back into my bag, even though my tongue still tasted like a city's dump. Before my eyes, the monster shrunk from a fat worm into a thin worm, and what's more, the huge hole I cut in its side grew back like the creature was never wounded, and even the missing arms of it were like new.
Regeneration, too? Oh, it would be the worst meal in my life—and since most of that life passed in Hell, that was saying something—but now I had to go through it. I brandished my claws again and readied myself.
The monster lunged at me like a lightning, flying through the air like a hairy spring with one pointy end aimed right at me. Astonished by a sudden burst of speed, I didn't even start dodging for a moment, and then it was too late.
Fish trains their DEX and STR all their life, because it rises up as they swim. A fish that swims long enough becomes UBERFISH.
Alright, that comes for any creature, but unlike landdwellers, fish doesnt have a luxury of just... not having to swim.