The whale lifted his tail out of the water and snapped it in the air, making a sound like a giant knuckle cracking as the massive tail muscles contracted.

"He's pissed," Nate said. "Let's go for a measurement."

"Now?" Amy questioned. Normally they would wait for another dive cycle. Obviously Nate thought that because of their taking the skin sample the whale might start traveling. They could lose him before getting a measurement.

"Now. I'll shoot, you work the rangefinder."

Nate backed off the throttle a bit, so he would be able to catch the entire tail fluke in the camera frame when the whale dove. Amy grabbed the laser rangefinder, which looked very much like a pair of binoculars made for a cyclops. By taking a distance measurement from the animal's tail with the rangefinder and comparing the size of the tail in the frame of the picture, they could measure the relative size of the entire animal. Nate had come up with an algorithm that, so far, gave them the length of a whale with 98 percent accuracy. Just a few years ago they would've had to have been in an aircraft to measure the length of a whale.

"Ready," Amy said.

The whale blew and arched its back into a high hump as he readied for the dive (the reason whalers had named them humpbacks in the first place). Amy fixed the rangefinder on the whale's back; Nate trained the camera's telephoto on the same spot, and the autofocus motors made tiny adjustments with the movement of the boat.

The whale fluked, raising its tail high in the air, and there, instead of the distinct pattern of black-and-white markings by which all humpbacks were identified, were — spelled out in foot-high black letters across the white — the words BITE ME!