Solitary zooids: up to 75 mm long (Cyclosalpa pinnata). Body muscles interrupted dorsally. Dorsal longitudinal muscles absent. Five pairs of light organs between MI and MVI. Dorsal tubercle moderately convoluted.
Aggregate zooids: up to 64 mm long (Cyclosalpa pinnata 1). Body muscles symmetrically arranged, MI and MII fused dorsally; MIII and MIV converging but not contiguous dorsally. Total number of muscular fibers (MI-MIV): 52-75. One pair of light organs between MII and MIII. Dorsal tubercle moderately convoluted.