biological control agent. In various areas such as Guam and the Okinawa islands, P. manokwari was introduced to control the population of the invasive Giant African land snail, which had damaged crops and threatened the agricultural industry. It has been said that "much of the 'evidence' that these predators can control Achatina fulica populations is based on a poor understanding of ecological principles. That the predators will prey on [Giant African land snail] is not evidence that they can control its populations...". The flatworm controlled the population of the Giant African land snail but it also began preying on populations of endemic land snail, which led to an unprecedented increase in the P. manokwari populations and a marked decrease in the endemic land snail populations. Ecological effects of invasion Platydemus manokwari has had several effects on the ecology of the communities that it has been introduced to. In the Pacific Islands that P. manokwari has invaded, several native land snails, specifically the Partula, Mandarina, juvenile M. aureola, B. similaris, Allopeas kyotoense, and Meghimatium bilineatum have either gone extinct or their numbers have drastically reduced. P. manokwari is such an efficient and invasive species that it has caused the decline and extinction of gastropods in several islands and is known as one of the ‘100 world’s worst invaders’. The success of P. manokwari as an invasive species can be attributed to several factors. One explanation is that P. manokwari has very few, if any, known predators and thus has few biotic limiting factors. Also, P. manokwari exhibits high tolerance for several environments. However, P. manokwari cannot survive in colder environments. P. manokwari has also shown versatility in prey tracking and attack methods of snail species. Experiments conducted by Yamaura and Sugiura indicated that P. manokwari can climb trees and track down nonmarine mollusks using olfactory cues. Experiments have shown that out of five other flatworm species, P. manokwari was by far the most efficient. In an experiment done by Isamu Okochi and colleagues, 5 different flatworm species (including P. manokwari) were kept in various storage units containing endemic snail species. Out of these five species, P. manokwari was the only species that had started to prey on the snail species within a day of introduction. Two of the other predatory flatworm species did prey on the snails, but their rates of predation were not consistent. This indicates that P. manokwari outcompetes