BL: 16-22 mm, AT: 6-10, H: 10-12. Hooks and teeth deep brown. Specimens living near the bottom morphologically slightly different from those in upper water column: with foamy collarette on entire body, long anterior fins, no traces of eyes. They might be taxonomically different.
Distribution in the South Atlantic: Widespread species 1 S.
Kingdom Animalia Phylum Chaetognatha Class Sagittoidea Subclass Chorismogonata Order Aphragmophora Family Sagittidae Genus Sagitta Species Sagitta macrocephala