Here is the full list of all 12 Biolum achievements.
Greet the bioluminescent Rattail fish.
Witness call and response between a plant and a fish.
Watch the interspecies light communication.
Discover the majestic creature in the cave.
Reach for Eva's hand.
Get devoured by something huge.
Transcend yourself.
Reach the end of the story.
Push the green button to start the descend.
Grab a sample of that kelp.
Clear a path through the tube worms.
Head through the fish spiral.