propagate fully from head to tail. Portions of the animal also become immobile by 15 minutes, which is reflected in the fixed color pattern versus time. We also compared the swimming of untreated (grey line) versus 20-minute exposure to ethanol (black line) by plotting the "neck" curvature versus time (Figure 5c). The animal treated with ethanol in NGM buffer showed a slowing in frequency, while the animal in Dent's buffer showed a much slower bend frequency and a rise in maximal bend amplitudes.