Across
- 1. Hole in the top of ocean mammal's head that they breath through
- 3. Rigid outer skeleton that provides protection and support
- 7. Mix of salt water and fresh water
- 8. Keratin filters that whales use to capture small animals like krill when they gulp ocean water
Down
- 1. Ability to float in water
- 2. Fatty organ in dolphin's head that amplify their echolocation
- 4. Flexible limbs that contain stinging cells in jellyfish
- 5. Organ that fish use to extract oxygen from the water
- 6. Fin on the back of fish and whales that help then keep stability in the water