Talk:Stalker/@comment-101.190.19.109-20150905025051/@comment-95.90.202.210-20151110135511

not necessarily. evolutionarily speaking, visible gills (which not all fish have, especially not ancient armoured fish which most life in subnautica is based off) arent necessarily the only way to oxygenate blood -- that's even if these animals breathe oxygen and not another molecule. the 'nostrils' could be electromagnetic or thermal detection, as we see in sharks, and pit vipers. from a biological perspective as well as a design one, there's no need for these animals to HAVE gills. i mean, technically, they're not even animals, as the evolutionary tree that divides life into kingdoms is unique to Earth. they're termed animals as that's the closest approximation, but they aren't animals in the technical sense.