Opsanus tau, commonly known as the Gulf toadfish, is a species of fish found primarily in the coastal waters of the Gulf of Mexico and the Atlantic Ocean. This fish is characterized by its stout body, large head, and distinctive vocalizations, which it produces using its swim bladder. The Gulf toadfish typically inhabits muddy or sandy substrates and is often found in estuaries and bays. The diet of Opsanus tau mainly consists of small invertebrates and fish. This species plays a role in the ecosystem by helping to control the populations of its prey. Additionally, the Gulf toadfish is known for its unique ability to produce sounds, which are used for communication, especially during mating rituals.