Cavern Cryosagania

The cavern cryosagania are attracted to the light of cave swarmers, using it as a photosynthesis hotspot. If there aren't any cave swarmers around, they will go to the entrance of the cave, where most cavern cryosagania are, making blue clouds in the water. The 'symbiotic' relationship with the cave swarmer fills their need for light, and give the cave swarmers plenty of food.