Top left: A single jellyfish lappet, or appendage, was multiplied and rotated to form an eight-armed mosaic image suggesting the muscle geometry (shown in green.) Right: An illustration shows the different stages of analyzing a juvenile jellyfish in order to design and build a tissue-engineered jellyfish. Bottom left: Image of swimming muscle at junction between lappet and main body in a juvenile jellyfish. Right: Colorized image of the tissue-engineered jellyfish in ocean-like saltwater. Credit: CalTech