The raccoons of the sea.
Otters are one danger. We all know we once nearly lost Jimmy Carter in the rabbit incident that shook the nation to its core.
https://www.google.com/search?q=jimmy+carter+and+rabbit+in+boat&tbm=isch&source=univ&fir=sb7zSwp6GA9RgM%252CqdJg3vRf9tvKiM%252C_%253BeQgJZ01TZCxYEM%252CKq2
I especially like the one with the Easter Bunny guy in the suit with Jimmy and Rosalyn.