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An order of sponges in which the body has a radial structure. spicules and organic fibres form the skeleton. The cortex is simple. oviparous forms reproduce sexually. Some live in holes they have bored.
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An order of sponges in which the body has a radial structure. spicules and organic fibres form the skeleton. The cortex is simple. oviparous forms reproduce sexually. Some live in holes they have bored.