Bottlenose dolphins also seem to whistle while foraging on various prey items (Acevedo-Guiterrez 2004). Scientists believe that as a group of dolphins finds a school of potential prey they will vocalize more frequently. This increase in vocalizations attracts more dolphins to the area that can assist with rounding up the fish, allowing all individuals to get a larger meal. An increase in the number of dolphins nearby also provides safety for all individuals, as sharks and other large predators are likely to want to feed from the same food source the dolphins have discovered.