Herring talk out of their bottoms. They communicate by emitting bubbles from their backsides that sound like high-pitched raspberries. These sounds are thought to help shoals to stay together in the darkness. The noise is known as a Fast Repetitive Tick or FRT.
I know some people who talk out of their asses, too.
BTW: high-pitched raspberries? Sounds like something Douglas Adams could write.
