Dolphins were once humorously alluded to as "gay sharks" on an episode of "Glee," but a new study suggests that bisexuality and even homosexuality among the marine mammals may be very much a reality. As Discovery News is reporting, research scientists at the University of Massachusetts studied more than 120 bottlenose dolphins in western Australia, concluding that the males were "found to engage in extensive bisexuality, combined with periods of exclusive homosexuality." Furthermore, male dolphin pairs, and even trios, cooperate to sequester and herd individual females during the mating season.