Because suitable hosts can be hard to find at times, the larvae have become significantly more advanced. While they retain their original scale shape, the center of the body has become thicker and the fringes of the body have become thinner. The thinner portion has been modified into a pair of fins capable of propelling the larvae through the water. The larvae also has a defined head that sports two short tentacles that are filled with chemoreceptors. This allows them to detect the wastes of nearby nightgrazers. Once a host is located, they will use their tentacles to feel their way to the back of the organism, where they will stick themselves to. The larvae have also developed a simple nervous system that allows it to interpret the information collected by the chemoreceptors and tactoreceptors. Nutrients are transferred throughout the body via nutrient ducts. These ducts interface with the digestive surface on the ventral side of the larva's body, transferring nutrients and wastes between the ducts and digestive surface.
Once attached to a host, the larvae will begin using nutrients gained through filter-feeding and the degeneration of its nervous system and nutrient ducts to metamorphose into a holdfast. From there, the mature jockey charnlit will begin growing its frond. Once the frond reaches a certain length, the final isomer will split off to form a new larvae as a new isomer takes its place.