Complex sentence: They can also shake their fins, pull their tail fin and the head above the water to observe the environment; they can jump out of the water, though rarely, with some jumping as high as a meter (3.14 ft).
Split into simpler sentences: They can also shake their fins, and pull their tail fin and head above the water to observe the environment. They occasionally jump out of the water, sometimes as high as a meter (3.14 ft).