Sponges are animals that can be many different
colors. They all live underwater, so they are
always saturated with water. That means they are
always as full of as much water as they can hold.
Their bodies are full of holes, from tiny to
big. This lets them move water through their
bodies. They filter food out of the water, so the
more water they can move, the better off they are.
Before people started making artificial sponges
(way before you were born), some sponges were
collected and cleaned. The soft skeleton that was
left was used just like we use artificial sponges
Real sponges are colorful when they are alive,
but their soft skeletons are sort of a sandy brown
color. As far as I know, there’s no connection
between the color of the animals and how much
water their skeletons will hold.
Some sponges have hard skeletons, so they were
never useful for making household sponges.
Lots of people find it hard to believe that
sponges are animals. What characteristics make
Marine biologists study sponges. That may be a
career you want to explore.
Thanks for asking,
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