You may not think so but sponges actually have skeletons. Their skeleton is made up of a network of
You may not think so but sponges actually have skeletons. Their skeleton is made up of a network of tiny glass like structures called spicules. Unlike corals, when sponges die their skeletons dissolve back into the water. While corals leave a solid skeleton for other things to grow on, a sponge’s skeleton will rapidly break down and become part of the bottom sediment. (Photograph: Warren Baverstock) -- source link
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