A sand tiger shark was tagged and released back into the watery wild after it snacked on another shark.

ORB stands for Ocean Exploration/Remote Sensing/Biogeography Group.  And the little group with the big name is making bigger headlines after a photo of a dogfish shark - not long after it was captured by a tiger shark - was released by the University of Delaware's ORB lab.

Shark on shark attacks are common, but it is not often that they are so artfully documented.  But then again, it is "Shark Week."

In a comment on the lab's Facebook page the researchers say that they were surprised themselves to see the sharks:

ORB Lab Facebook page