has anyone’s mermaids successfully drowned a sim?

nope. Even tried to force it one day, grouping up with a random sim and swimming out to a spot with the longest way back to land.
Thought that, as the gurus said, we cant directly kill other sims that way but they will drown of moodlets and need decay and stuff... so i thought..

I think my sim pulled that poor townie under 4-5 times, everytime he would try to swim back i placed a ''swim here together'' and disallow him to shore. but nope. gave up in the end.