CLASSIFICATION OF ZOANTHUS​

KINGDOM :- ANIMALIA ( Multicellular eukaryotic organisms)

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

CLASS :- ANTHOZOA OR ACTINOZOA (Only polypoid generation. sedentary, solitary, colonial.)

SUB-CLASS :- HEXACORALLIA (Tentacles and mesenteries in multiple of five or six.)

ORDER :-  ZOANTHARIA (Epizoic. Pedal disc and skeleton absent. Mesenteries paired. )

FAMILY :- ZOANTHIDAE 

GENUS :- Zoanthus

GEOGRAPHICAL DISTRIBUTION

  • Found in West Indies.

HABIT AND HABITAT

  • Zoanthus is a colonial sea-anemone springing from an incrusting or stolon like base. Many are epizoic in habit being incrusted on hermit crabs, sponges and hydroids.

ZOANTHUS

GENERAL CHARACTERSTICS OF ZOANTHUS​

  • Body differentiated into column and oral disc having mouth and marginal tentacles. 
  • Polyps of colony are united by basal stolons attached to substratum. 
  • Polyps are clariform, cylindrical, elongated and without foreign bodies on their surfaces. 
  • Tentacles 48 to 60. 
  • Mesenteries consist of macro and micro-mesenteries differing from all other anthozoans and having characteristic arrangement.
  • Single siphonoglyph present.
  • Animals may be colourless or coloured. 
  • Sexes are separate.
  • A sexual reproduction takes place by simple budding from stolon.
ZOANTHUS

IDENTIFICATION

  • The colony is connected by stolons and has all above characters and hence it is Zoanthus.

ZOANTHUS
ZOANTHUS
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