Northern elephant seal, thermograph. Wet region of the skin on right side of the body (blue) and dry skin region on the left side of the body (red). Note the clear demarcation between heat emitting dry skin region and rather cold wet skin region. Environmental temperature was 20.5-22.7°C. T max =33.4°C (Sp2), T min =24.2°C (Sp1), ΔT = 9.2°C, T bkg =24.7°C (Sp3).