AURELIA​ (JELLY FISH)

CLASSIFICATION OF AURELIA​ (JELLY FISH)​

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 :- ULMARIIDAE (Simple or branched radial canals and a ring canal.)

GENUS :- Aurelia (Jelly fish)

GEOGRAPHICAL DISTRIBUTION

  • Very common along the entire Atlantic coast and Pacific coast and only form reported in temperate regions.

HABIT AND HABITAT

  • Aurelia is a solitary marine and medusoid jelly-fish often living in brackish water. It inhabits coastal water of all oceans in all zones and in abundant number, mostly living in warm and temperate latitudes

AURELIA​ (JELLY FISH)

GENERAL CHARACTERSTICS OF AURELIA​ (JELLY FISH)​

  • Commonly called as Jelly fish measuring approximately 30 cm in diameter.
  • Body is gelatinous, transparent, bluish, white, reddish or pinkish. 
  • Saucer-shaped body is distinguished into convex ex-umbrellar and concave sub-umbrellar surfaces. 
  • Various other structures seen are gastric filaments, sub-genital pits and velarium. 
  • Sub-umbrellar margin contains marginal tentacles having stinging cells and 8 marginal lappets having sense organs or tentaculocysts in 8 lobes.
  • Mouth 4-comered. Each comer is drawn out into an oral arm along perradii. 
  • Inter-radial, adradial and per-radial gastrovascular canals open in circular canal. Velarium present. 
  • Jelly fish feeds on molluscs, crustaceans, protozoans, nematodes, rotifers, diatoms, polychaetes and copepods. (9) It swims by rhythmic contractions of umbrellar surfaces. 
  • Male and female separate individuals. Life-cycle shows alteration of generation. 
  • It responds to mussel juice, proteins, peptones, amino acids but not to sugars, starches or glycogen.
AURELIA​ (JELLY FISH)

IDENTIFICATION

  • The animal has jelly like texture, marginal tentacles, oral arms and all above characters, hence it is Aurelia.
AURELIA​ (JELLY FISH)
AURELIA​ (JELLY FISH)
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