Jellyfish are ancient, adaptable animals whose graceful movement hides a fascinating combination of simple anatomy and remarkable survival strategies.
Jellyfish have lived in the oceans for hundreds of millions of years. They have no bones, heart, or brain, yet they are remarkably successful in waters around the world.
Their bell-shaped bodies pulse to move through the water, while currents do much of the work. Tentacles help them sense their surroundings and capture food.
Watching jellyfish closely offers a lesson in efficient design: simple structures, finely tuned to the environment, can support an extraordinary way of life.