While it is small enough to fit in your pocket, it's dubbed "pocket" because of the distinctive orifice behind its pectoral fin one of many physiological features scientists hope to better understand."The pocket shark we found was only five-and-half inches long, and was a recently born male," said lead author Mark Grace from the Southeast Fisheries Science Center (NOAA), Mississippi.

Grace noted that the shark had an unhealed umbilical scar."Discovering him has us thinking about where mom and dad may be, and how they got to the Gulf. The only other known specimen was found very far away, off Peru, 36 years ago," Grace said.

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