My four times great uncle Caleb put his arm around a manatee one time and got right friendly with her. But her daddy caught 'em and made Uncle Caleb marry her.

Unk Caleb was pretty danged nearsighted, and he'd heard about mermaids, and well, you kin figger out the rest. We don't think there was any kids, which is good, 'cause we've always been sort of conservative about cross-species dating. My family's always pritty much stuck to other human beans.