Get a clue about how to get help in MARA the racing game:

Light in the darkness

When racing you have to be careful not to get lost in the vastness of the deep dark sea. In the game you can find glowing jellyfish that function as underwater streetlights along the track and show the way through an otherwise dark seascape. The phenomenon of organisms producing light is called bioluminescence in real life.

Eating marine snow

Keep up your energy levels by eating marine snow at the sea floor or by the large whale skeleton. 

Seeing by help of sound

If you get too close to obstacles in the darkness, for instance black smokers or cliff walls,  echolocation sounds like those used by dolphins and other sea creatures, will let you know.