What cleans the water as it feeds?
ecosystems sharks cats fish arachnids horses lamphreys sponges
A B C D E F G H
Since mussels are filter-feeders, they clean water as they feed.
sponges clean the water as they feed
What cleans the water as it feeds? (A) ecosystems (B) sharks (C) cats (D) fish (E) arachnids (F) horses (G) lamphreys (H) sponges