siamese fighting fish video clipsAn instance of the apparatus is diagrammed in Figure 1 all letter references during this description are to this figure. Each aquarium was 20. 5 cm high by 30 cm long by 14. 5 cm wide and contained approximately 9. 5 L of water a. The device used to record responses was a plastic ring b, with a 4. Figure 3 shows responses per hr for every fish. Fish 2A first replied in the course of the third session and Fish 4A in the course of the sixth session. Responding happened earlier in Fish 1 and 2, presumably as a result of their outdated exposure to the FR 1 schedule. Across fish, common response rates for the last six periods during both FR 1 situations ranged from 8. 4–30. 6 responses per hr.