They'd probably die due to a lack of coordination.

[color=green]"Alright, lower the water level more!"

[b]"W-WAIT!! I SAID LOWER IT, NOT RAISE IT! [i]I ' M  G O N N A  D I E![/i]"[/b][/color]

Despite the panic, Dekkunda just sort of... Floats up to the top like he's a buoy. Hard to swim beyond that without arms though.