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Most members of the Class
Hydrozoa are marine, carnivorous and colonial with radial body symmetry.
Portuguese man of war belong to this class and is a colonial
animal.
This animal is composed of several types of modified medusae (umbrella like body form) and polyps (tubular body form) that act as one individual.
Hydras are the solitary animals and live in freshwater. These animals are carnivorous in which they use their tentacles to capture their pray and lead it to their mouth.
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