The distribution of Chaetognatha in the western central Pacific

The recorded 15 species of Chaetognatha are studied in the zooplanktonic samples collected in the waters of the western central Pacific (0°-50N,160°-165°E) within January and February,and within April and May in 1979.A primary analysis is conducted on the relations of Chaetognatha species composition and numerical distribution with their environmental conditions in the waters by taking into account the field hydrological data.