The Brazilian batfish or Seadevil, Ogcocephalus vespertilio, is a species of batfish. Its distribution includes the western Atlantic, from the Antilles to Brazil. This species grows to a length of 30.5 centimetres (12.0 in) TL. It lives on the ocean-floor, covered in sand. The fish are flat, resembling pancakes. It preys on bottom-dwelling invertebrates. This species can be found in the aquarium trade.