It should be possible to Breed and Grow Crabs, Slugs and Fish. For Pet-Like combanions around and inside your Base. And of Course like in Subnautica 1 as your very own super-fresh Sushi bar. Imagine hatching a tiny Coral Crab and grow it, till it is huge(Pet). Or your very own Marrowbreach “guard-Dog”(also as Pet).