CLASSIFICATION OF CYANEA
PHYLUM :- COELENTRATA (Tissue grade, diploblastic and acoelomate. )
CLASS :- SCYPHOZOA (Medusa well developed, hydroid reduced.)
ORDER :- SEMAEOSTOMEAE (Free-swimming scyphomedusae with umbrella-like disk and oral lobes.)
FAMILY :- CYANEIDAE (Tentacles clustered, branched and radiating.)
GENUS :- Cyanea
It is found on the coastal waters of America, polar region and Pacific coast.
HABIT AND HABITAT
Cyanea is the largest, solitary, bioluminescent and marine medusa.
GENERAL CHARACTERSTICS OF CYANEA
- Commonly called as Sun-jelly or Sea-blubber.
- Monstrous red or wine-coloured jelly fish.
- Largest known scyphozoa measuring 5 cm to 2 metres across the disk and some tentacles measuring 40 metres in length.
- Body divided into sub-umbrellar and ex-umbrellar surfaces.
- Margin of umbrella contains 8 bilobed lappets and 8 rhopalia in each niche between lappets .
- Eight adradial V-shaped clusters of tentacles spring from sub-umbrella.
- 4 angles of mouth are drawn into 4 long, wide and voluminous oral arms. Radial canals extend into the rhopalia and tentacles. Circular canal is absent. Gonads prominent.
- It produces burning sensation when in contact with human body.
- It swims by rhythmic contractions of umbrellar surfaces with the help of radial muscles and coronal muscles.
- Cyanea also responds to mussel juice, proteins, peptones, amino acids but not to sugars, starches or glycogen.
- The animal has V -shaped clusters of tentacles, voluminous oral arms and all above characters, hence it is Cyanea.