CLASSIFICATION OF CERATELLA

PHYLUM :- COELENTRATA (Tissue grade, diploblastic and acoelomate. )

CLASS :-  HYDROZOA  (Hydroids containing medusa with velum.)

ORDER :- HYDROIDEA (Polypoid generation well developed. )

SUB-ORDER :-ATHECATA (Hydrotheca absent.)

GENUS :- Ceratella

GEOGRAPHICAL DISTRIBUTION

Cosmopolitan, but most common in India, Canada and U.S.A.

HABIT AND HABITAT

Ceratella is a colonial. Sedentary hydroid coelenterate.

CERATELLA

GENERAL CHARACTERSTICS OF CERATELLA

  • Tree like and highly branched.
  • Branches arising from central axis or hydrorhiza are intertwining and anastomosing.
  • Ceratella has sea fan like appearance. 
  • Hydrothecae cover polyps and gonothecae enclose medusae.
  • Medusae bear gonads on the manubrium and devoid of lithocytes. 
  • Eye-spots are present.
CERATELLA

IDENTIFICATION

The specimen has anastomosing fern-like appearance and all above features hence it is Ceratella.

CERATELLA
CERATELLA
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