Fig. 8. Histogram of the percentage of orientations at electric-field intensities of <0.1 µV cm^-1. Scalloped hammerhead sharks Sphyrna lewini (A) and sandbar sharks Carcharhinus plumbeus (B) demonstrate similar distributions across the entire range of field intensities. Both species initiated approximately 35-40% of orientations to stimuli of <0.01 µV cm^-1.