Shark gulps another shark whole

[link to www.msnbc.msn.com] cool.....The photo says it all: an alien-looking shark, adorned with mossy hairs and a flat face, with its mouth agape and a slender bamboo shark headfirst inside. Though not unusual for a shark to snack on another shark, it's not typical behavior — and it's certainly not common for humans to catch the action firsthand.