What are gills used for breathing by sharks?
air mussels carbon monoxide lava fish open water squids
A B C D E F G H
Shark exhibit Come face to face with the ultimate aquatic predator.
gills are used for breathing water by sharks
What are gills used for breathing by sharks? (A) air (B) mussels (C) carbon monoxide (D) lava (E) fish (F) open (G) water (H) squids