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Fig. 2. Schematic diagram of our test arena and equipment. A mirror below the tank
provided ventral views of the fish for two cameras. The right portion of the
tank is the starting chamber, and the stopping chamber at the left contains a
worm attached to a weighted line. Note the two openings in the vertical
partitions, which required the sunfish to travel in a straight line to reach
the worm and execute the braking action.