alligator

Alligators

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With no fins or flippers, alligators are silent and sneaky hunters because they can shift the position of their lungs to change how high they float in the water. When diving, the alligator uses its muscles to push its lungs toward its tail, so the head is easier to submerge. When it rolls, its lungs are pushed to the side. When it surfaces, the lungs are nearer the head.
alligator

Alligators

By
With no fins or flippers, alligators are silent and sneaky hunters because they can shift the position of their lungs to change how high they float in the water. When diving, the alligator uses its muscles to push its lungs toward its tail, so the head is easier to submerge. When it rolls, its lungs are pushed to the side. When it surfaces, the lungs are nearer the head.