CLASSIFICATION OF DIPHYES
Cosmopolitan, tropical and sub-tropical, Atlantic, Mediterranean, Pacific coast, San Francisco to Alaska.
HABIT AND HABITAT
- Polymorphic, free swimming, marine, pelagic and colonial hydromedusae.
GENERAL CHARACTERSTICS OF DIPHYES
- Diphyes is divided into upper and lower parts without pneumatophores.
- Upper part of the colony contains two identical swimming bells or nectophores having tandem arrangement.
- Each bell contains mouth.
- Lower part represents rest of the colony contmmng widely separated groups of zooids or cormidia.
- Each zooid contains mouth, coenosarc, a hydrophylum, a medusoid form, a polyp or gastrozooid and number of terminally knobed tentacles bract and radial canal.
- Knobed part of the tentacle contains battery of nematocysts.
- The colony is constantly being shortened due to breaking of old and terminal zooids at the internodes.
- Detached zooids are called as endoxia which swim about like independent organisms and later on become sexually mature.
- The animal has two identical and tandem swimming bells and all above characters, hence it is Diphyes.