User blog comment:Ideas are awesome/What do you want the creators to add to the arctic/@comment-27251286-20180507151310

How about legged worms like those that could be found in the Cambrian oceans on Earth?

Communal spider-like creatures farming worm colonies around thermal vents. Workers have rough exoskeletons to give good settling grounds to the worms' polyps and then transplant them around the vents to replace those eaten, it's both a logical adaptationnal path AND a good potential material! Warriors attack in groups and supplement the colony's diet by hunting creatures trying to eat the colony's farms, so approach with caution. Think of them as underwater ant spiders with farms. Let's say a worker is hand-sized, and the warriors are about 1.5x that.

Other propositions :

trilobite-like species

mobile algae colonies (predatorial or not)

land (or iceberg) dwelling crustaceans that maybe feed on the not!penguins

plankton cultivation setups (since both animal and vegetal plankton play a gigantic role in arctic ecosystems)

an ambush predator cousin of the blighter that hides in sea weed

a smaller but way speedier cousin of the boneshark

maybe some descendant species of the extinct giants seen in the main game, made smaller to adapt to reduced living space.

I also propose that the Kharaa bacterium didn't spread as much there, due to extreme conditions hampering it, allowing life to progressively develop an immunity as the animals with less resistance got wiped out but those with higher resistance survived anough to breed, thus allowing adaptation over generations.

That's about as much as I can think up right now. If anyone feels this is interesting enough to froward to the devs, I'd be grateful.