A fish so loud in its spawning that residents in San Francisco Bay were kept awake by what they thought was the humming of an electricity line. The noise appeared once a year and was so loud they planned to sue the electricity company. In fact, it was made by the male toadfish vibrating a muscle on his swimbladder to attract the female with a noise similar to a foghorn. The female swims towards the male and when he grabs her in his jaws they retreat to a suitable crevice to spawn in private. Residents of the bay now celebrate this event with an annual festival.