Just the usual squishy organic bullshit, Dirk answers. But if you say so, bro.

The entire pattern of the shifting auras is interesting to Dirk, and he has wondered a lot about it as a form of communication. It reminds him a bit about what he read about octopuses. Maybe he'll be able to work out what all the patterns mean, in time.

For his part, he swims pretty silently. The shades have been modified well enough to suit this kind of environment, but the water is still dark, deep, and murky. He turns his head just a fraction, not sure if he saw motion to his left or if it was nothing...