asked. Encircle the letter of the best answer. 11. Which of the sea animals can walk underwater? A. Clam B. Crab C. Dolphin D. Whale 12. Some animals like fishes can breathe under water. What body structures do fishes have that help them breathe in water? A. Fur B. Gills C. Lungs D. Scales 13. Animals breathe differently. Which of these animals can breathe through their smooth skin? B. Prawns A. Fish C. Snail D. Worms