Deep Glowswarmer

As they began to adapt further to the Otter vents and the deeper waters as a whole, the glowbulb swarmers began to shift away from the traits that remained from their more epipelagic ancestry. They have completely lost their photosynthesis, instead relying on shifting drifts of bacterial blooms and marine snow. They have fully developed a symbiotic relationship with a strain of symbiocells that now lives within skin sacks on abdomens. These sacks grow without a distinct pattern on the swarmer, and no two swarmers will have the same amount and distribution of them. They control the glow using tissue spasms. As they are the only creatures in the deep sea with any form of color vision, they use this bioluminescence to find and coordinate the swarms. They have significantly smaller than the ancestor they have replaced, reflecting the decreased availability in acquiring food. They are extremely common in the deep oceans, living in swarms of millions, and are a vital source of food for higher tropic levels.