WebCharacteristics of Coelenterata. These are mostly aquatic or marine habitat animals. These species exhibit a tissue-level organization. The mouth is enclosed by thin and short tentacles. They are diploblastic animals, in which, the body is made up of two layers of cells: Ectoderm – One layer makes up the cells outside the body. WebObelia — The Sea Fur: Obelia is polymorphic. The three types of individuals are polyps, blastostyles and medusae. The polyps are mainly nutritive in function, while the blastostyles give rise to reproductive individuals, the medusae by budding. The medusae contain gonads for sexual reproduction.

Characteristics of Phylum Cnidaria Biology for Majors …

WebObelia is a typical representative of colonial hydrozoa (Fig. 12.14). It is exclusively marine. It exists in two principal forms, the polyp and the medusa. The polyp or hydroid form … Web2. Structure of Obelia: A. Hydroid or Polyp Phase: This stage of Obelia is a branched filament like structure and remains attached with the … raymond lenox

POLYMORPHISM IN CNIDARIA (COELENTERATE) - BIOSCIENCE

Web6. The proximal end gradually narrows down and a disc appears for attachment. The distal end expands and by developing a manubrium and a circlet of tentacles, it turns to a … WebAn example of cnidarian dimorphism can be seen in the colonial hydroid Obelia. The sessile asexual colony has two types of polyps, shown in (Figure 3). The first is the gastrozooid, which is adapted for capturing prey and … WebObelia is sedentary, marine colonial form found attached on the surface of sea weeds, molluscan shells, rocks and wooden piles in shallow water up to 80 metres in depth. … simplified icse chemistry