CLICK TO HEAR THE ROACH HISS! Yes they really do hiss.  When they are frightened or mad they blow air through vents on the sides of their body making the hissing sound. Two of my roaches.  A male in the forefront with the 2 bumps or horns on its forehead, and a female in the back with the smooth forehead.     CLICK IMAGE TO ENLARGE Multiple roaches in their 5 gallon aquarium ‘Roach Motel’. CLICK IMAGE TO ENLARGE Female roach with protruding egg case. CLICK IMAGE TO ENLARGE A new hatching of baby roaches enjoying animal crackers. Adult sized roach in the background. Everyone loves strawberries, even hissing roaches!

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University of South Carolina Roach Cam