...aquatic organisms: soluble molecules, including steroid-based fish sex pheromones (Sorensen and Stacey, 1999) and large, polar molecules, including the alarm pheromone of the sea anemone (Howe and Sheikh, 1975). Alternatively, various marine invertebrates use polypeptides as chemical cues (Zimmer and Butman, 2000). As established previously, most marine organisms manage chemical cue compounds in exchange of data as well as to manage essential activities (Wyatt, 2003), including reproduction, sperm activation and attraction, predator-prey interactions, larval settlement and metamorphosis, homing and the management of social hierarchies (Wyatt, 2003). Sex pheromones considered chemical... ? Introduction:...