The type of symmetry found in starfish and jellyfish is known as radial symmetry. This means their body plans are arranged around a central axis, allowing their body parts to be evenly distributed around that point. Both echinoderms (like starfish) and cnidarians (like jellyfish) exhibit this symmetry, making them particularly well adapted to their aquatic environments. Radial symmetry allows these organisms to interact with their surroundings from multiple directions, enhancing their chances of survival and their ability to capture prey or evade predators.