Although they may not look like much, these underwater creatures - TopicsExpress



          

Although they may not look like much, these underwater creatures are amazing natural water filters! As your bathroom sponge has holes, so does a sea sponge. These holes or pores are known as ostia. They filter water by breathing in and out of these pores and take in any organic particles and plankton that would serve as food, and oxygen through neatly-divided canals. The quantity of water that passes through a sponge in a day is about 20,000 times its own volume! youtu.be/65vEVmZIiNg
Posted on: Thu, 11 Dec 2014 20:08:08 +0000

Trending Topics



Recently Viewed Topics




© 2015