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This is how sponges keep water clean
Marine life researchers used a non-toxic dye to study how sea sponges helped ocean water clean.
Footage shows the green colouring being sucked by the underwater creature into its pores. It then appeared to repeat the cycle of sucking and shooting it out making the shade lighter.
The Florida Fish and Wildlife Conservation Commission (FWC) did the experiment to measure how sponges filter water in Florida Bay.
They said that as filter feeders, sponges pump water through their pores, removing plankton, bacteria, and excess nutrients that help keep the waters clear, as they are capable of filtering hundreds of gallons a day.
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