Identify the vertebrate group of animals characterized by the presence of 6-15 pairs of gills for respiration.
In Cyclostomata 6-15 pairs of gills are present for the respiration. In Osteichthyes 4 pairs of gills are present for the respiration. In Chondrichthyes 5 pairs of gills are present. In Amphibia gills are present only in larval forms.