Chaetognaths of the Indian ocean, with a key for their identification

The authors have recorded 33 species of Chaetognaths belonging to four pelagic genera (Sagitta Quoy and Gaimard; Pterosagittci Costa; Krohnitta Ritter-Zabony; q d Eukrofmia Ritter-Zationy) and one benthic genus (Spadella Langerhans), from the Indian Ocean and contiguous Seas. The dependable specific characters useful in identification are discussed and an illustrated key to the identification of the genera ax& the species is provided