Practice English Speaking&Listening with: Sea Sponges -- Marine Life Series. (Turn on subtitles for details)
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Natural Sea Sponges (Porifera) are some of the simplest multicellular organisms alive.
They do not have brains, digestive, circulatory or nervous systems and, once rooted, do not move.
Tube and Vase sponges are extremely colourful and provide shelter for many types of marine life.
Sponges feed by filtering water. They can filter an amount of water 100,000 times their size each day!
A Barrel sponge can grow large enough to fit a person inside!
The Description of Sea Sponges -- Marine Life Series. (Turn on subtitles for details)
