Moving underwater and moving in null gravity are similar. The impulse to swim is there in either case. Still, there is pressure and drag in the water, and perception of the currents.

Better not to race, to move unhurriedly. The base is a good distance away and sharp panicking movements are hard for many predators to resist.

"Try not to worry! Just keep an eye out. You look down, I'll cover the sides." Humans have eyes very like Quarren, better for scanning the deeps while swimming, while the Cala's eyes are far larger and more widely set.