From Buzzfeed:

Ninjemys oweni was a gigantic turtle from the Pleistocene era. Originally placed in Megalania by Richard Owen, it eventually was reclassified as Ninjemys in 1992. The etymology was explained as such: “Ninj” after “Ninja, in allusion to that totally rad, fearsome foursome epitomizing shelled success” and “emys” from the Latin for turtle. Meaning the entire name roughly translates to “Owen’s Ninja Turtle.””