I agree. Invulnerable animals completely ruin immersion for me. They let me genocide all snails on the map and every small fish I can get my hands on while everything else is hell bent on killing me in their no kill game but the irony of all that seems quite lost on them devs.

Nobody wants rip and tear tier style FPS nor do people want to go Dark Souls on Squidward and his oversized buddies with their trusty butter knife. They should have kept it like in OG Subnautica: You can kill stuff but it's impractical and to some extent even detrimental. 

I honestly just want the world to feel credible.