player needs to consume water through a bottle of water, water bottle from the mod or destiled water bottle

when thirst runs out, the player slowly dies

while in sector zero the player has a heat meter on the bottum left which slowly drains when in the open on land

it refills when inside a covered place, inside water or when gaining the heated effect through plants or special food

player can get infected with khaara while on planet 4546b (subnautica 1 planet)

khaara slowly progresses

at a later stage the player gets green marks on his skin

when not cured with enzyme 42 (recieved through sea emperor when progressing in the story) the player will die of khaara

when infected with khaara self scans with the scanner can show the stage of infection