Is the Geat leader the fish Grendel's mother warned him about? is there any evidence that I can find if he is.

Beowulf is believed to be the "fish" Grendel's mother warns him about. The "fish" is symbolically linked to the "Christ figure," and images of fish are used throughout Chapter 11 to describe the Geat.

“Beware the fish."

“....has no more beard than a fish....”

shoulders— “.....sleek as the belly of a shark.”