NBC has this picture of a shark swallowed whole by another shark.
This bizarre "turducken of the sea" photo was captured by researchers at the University of Delaware's Ocean Exploration, Remote Sensing, Biogeography (ORB) Lab. The scientists were in Delaware Bay this month to recapture sand tiger sharks that had been tagged with satellite-tracking tags, or to recover tags that had come off prematurely. [See Video of Shark Trapping & Tagging]
To capture a sand tiger shark, researchers baited a hook with a menhaden, a common marine fish, which was quickly snatched up by a smooth dogfish (Mustelus canis). "This unlucky smooth dogfish couldn't resist the menhaden used as bait and, unfortunately, fell victim to one of the top predators in the bay," ORB researchers wrote on their Facebook page. "The dogfish was about 3 feet (1 meter) long and completely swallowed by the sand tiger shark."