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Science Of Animal
- Ctenophores
- Platyhelminthes
- Nematodes
- Annelids
- Mollusca
- Arthropods
- Echinodermata
- Chordata
Animal Class
Porifera :
- Callcarea
- Hexactinellida
- Demospongiae
Cnidaria :
- Hydrozoa
- Scyphozoa
- Anthozoa
Ctenophores :
- Tentaculata
- Nuda
Platyhelminthes :
- Turbellaria
- Trematoda
- Cestoda
- Monogenea
Nematodes :
- Ascaris lumbricoides
- Ancylostoma
- Enterobius vermicularis
- Wuchereria bancrofti
- Trichinella spiral
- Heterodera radicicola
Annelids :
- Polychaeta
- Oligochaeta
- Hirudinea
Mollusca :
- Polyplacophora
- Gastropoda
- Pelecypoda
- Scaphopoda
- Cephalopoda
Arthropods :
- Crustacea
- Chelicerata
- Myriapoda
- Hexapoda
Echinodermata :
- Asteroidea
- Ophiuroidea
- Echinoidea
- Holothuroidea
- Crinoidea
Chordata :
*Acraniata :
- Urochordata
- Cephalochordata
- Hemichordata
*Craniata :
- Pisces
- Agnatha
- Chondrichthyes
- Osteichthyes
- Amphibia
- Reptilia
- Aves
- Mammalia


Information On Animals

Saturday, June 9, 2012

Hydrozoa

Hydrozoa are a class of members of the invertebrates are included in the phylum Cnidaria. Most animals live in marine Hydrozoa and colonize. The life cycle of most Hydrozoa includes the asexual polyp stage and a sexual medusa stage, eg Obelia. There is also a fixed form such as Hydra polyps.
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