Owner of a Farr 40 about 5 slips down from me had one of those critters gnaw through the raw water intake hose for his engine and the boat took on water to above the floor (sole). Unique response here in Lauderdale, he called the Fire Department and they pumped out his boat till he could diagnose where the water was coming from and close the through hull. Gotta love the FD, don't know the fate of the critter though. I wouldn't want to swim in the water here either.
Mike and Joyce, S/Y "Tattoo"
"There is nothing- absolutely nothing-
half so much worth doing
as simply messing about in boats."
The Wind in the Willows