Foghorn: The “boat whistle” call of the male toadfish, made to attract females, is produced by vibrating muscles surrounding his swim bladder. Toadfish are found in warm, shallow waters with muddy bottoms, especially near dock pilings, bulkheads, seawalls and oyster reefs. The common species on the U.S. Atlantic Coast is the oyster toadfish, with its simple buuuuurrp call. In the Gulf of Mexico, the Gulf toadfish has a slightly more complex call (bah -doooooo). Toadfish are related to the midshipman fish, which are known to drive liveaboards crazy in San Francisco Bay with their droning hum.