Is the reason they don't swim because they're slower? Or they can't use weapons? Logicaly, find them, jump off the boat, dive (they can breath underwater right?) and climb aboard
Womp womp

*rearranges your genetic sequence without consent*
“Ha, now you're a block of flesh, parry that casual”

*rearranges your genetic sequence without consent*
“Ha, now you're a block of flesh, parry that casual”