The Coil are an insectoid, endosymbiotic relationship consisting of a Body organism (a large, endoskeletal insectoid animal with chitinous skin plating and a humanoid body plan) and a Soul organism (a small, invertebrate nematoid animal that lives in the Body’s brain). The Soul is an obligate endosymbiote; while it can be kept alive out of a Body artificially, it displays no signs of sapience and cannot easily be transplanted. However, together the Body and Soul compose a being of approximately human intelligence. Protosouls aren’t considered people in terms of rights.
Their ships are heavily biological.