The aggressive monitor of male Siamese combating fish, Betta splendens hereafter, Bettas, is reliably elicited by images of an alternate male Betta. Visual reinforcement of the responding of those males also has been tested repeatedly when such images are supplied dependent on a specified response. In various experiments, visual access to models of different male Bettas Thompson and Sturm, 1965, a live male or female conspecific Rnic, 1977, mirror presentations leading to an image of the fish serving as the experimental subject Lattal and Metzger, 1994; Thompson, 1963, and film clips of another Betta Turnbough and Lloyd, 1973 all are enough to expand and maintain operant responding in male Bettas. In addition, the colour of the fish presented as a model Thompson and Sturm, length of mirror presentation Wirth, Lattal, and Hopko, 2003, delay of mirror presentation from the reaction Lattal and Metzger, and schedule of reinforcement Turnbough and Lloyd each affect the opportunity of the operant response. Such responding for visual reinforcement also has been stated for other participants of the Anabantoid family to which the Betta belongs. In male paradise fish Macropodus opercularis, for example, mirror images elicit aggressive displays Francis, 1983 and beef up and hold operant responses Melvin and Anson, 1970.