(11) Exactly opposite the mouth at the other end of the pole is the statocyst which acts as the balancing organ.
(12) The tentilla fringing the tentacles are covered with sticky colloblasts which are used to catch the prey.
(13) They feed on anything from larvae of sea organisms to the adults of small crustaceans.
(14) The juveniles of two species of the Ctenophora phylum live as parasites on salps which are fed on by the adults.
(15) The Ctenophores are hermaphrodites with eggs and sperms produced on two sides. The fertilization is external.
(16) The Ctenophores don’t have a circulatory, respiratory, excretory or skeletal system.
(17) The prey is liquefied in the pharynx by an enzyme and muscular action. The slurry passes through the canal and is digested by nutritive cells. The unwanted particles are pushed out through the anal pore or the mouth.
(18) The Ctenophores are broadly divided into three. The Cydippids, the Lobates, and the Beriods.
(19) The Cydippids have spherical or oval bodies with tentacles in sheaths. The Lobates have a pair of lobes which extend past the mouth. The Beriods have no tentacles for feeding. They feed with their mouth open.
(20) Most Ctenophores live on the surface and hence are colorless. Some of the species that live deep in the ocean have bright colors. Most of them are also bioluminescent.