The green swarmer developed via a natural phenomenon called neoteny. This means that the organism reaches sexual maturity without becoming an adult. This happened to some specimens of the strainbean. This was very successful, and soon they spread throughout the LadyM Ocean, except for the part between Glicker and Wright. The reasons for this success was that, on one hand, there is a high production rate, because now they don't even have to reach adulthood and, on the other hand, there is a lack of predators...at first. Soon after the green swarmers established themselves in the ocean, many creatures discovered this whole new food source, such as strainbeans and miscellaneous beakworms, and even animals which normally eat bigger animals, such as snarks. The green swarmers look much like the very primitive filter feeders in the beginning of the plents' evolution, except for the facts that they have only one eye and their body is rotated by 90 degrees, since during the growth of young strainbeans the larvae will tilt to the side. In fact, they are really much the same as strainbean larvae, only that the green swarmers can reproduce without becoming adults.