Swarmers

Swarmers are an offshoot of the shovel heads that went through neoteny. (To be specific, the ancestor was the strainbean) The first swarmer was the green swarmer. Swarmers are extremely common in the oceans of Sagan 4, and even compose two globe-spanning genus groups, the miniswarmers and microswarmers. An early offshoot from the green swarmer, the cloud swarmer, even lives airborne.

Anatomy
Swarmers have only one eye. They are typically green.

Diet & Energy
Diets vary, but most swarmers are capable of photosynthesis.

Senses
They have one eye on the tops of their body frames.