2. Sponges are dark under water this is due to membrane.
3. Some sponges can live up to 15,000 years!
4. There are approximately 5,000 species of sponges.
5. Sponges are known as a sea foam in the 17th century.
6. And most importantly they do not have a back bone.
Sponges can be very tall. |
Can you see the pores? |
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