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Animal Kingdom
A sponge harmful to oyster industry is
Cliona
Euspongia
Hyalonema
Spongilla
A.
Cliona
Boring sponges, such as Cliona, attach themselves to shells of oysters, clams, barnacles etc, boring them so full of holes that their contained animals are destroyed and in time, the shells are entirely broken up. Lime of these shells gets dissolved into sea water to be used over again by other animals. Sometimes, these boring sponges may prove great nuisance to oyster beds.
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Water vascular system is the characteristic of which group of the following:
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How important is the presence of air bladder in Pisces?
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Match the following:
Prepare a list of some animals that are found parasitic on human beings.
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