>>14622972
I think that it would benefit greatly from them having a neutral network. Also, local gas proportions.
There would be different parts that act as inputs, like a gas level measure part, an eye, a light level perciever, energy level perciever. The creatures would have output parts that could be switched on and off as specified by the brain, like swimmers, mouths, shields, etc, that would consume energy when on. An example of a creature would be a plant that is able to measure the co2 level. When it gets too low, it activates the swimmers, and swims until it finds a place with enough co2.