Waterfall + Dark... what will it be?

Last night I decided to breed my L.10 Waterfall (Skipper) and my L.10 Dark (Toothless). The breeding turned out to be 12 hours. I'm still not sure what it is, but I checked out dragoncityguide.net and according to their amazing breeding calculator it is more than likely going to be a pirate dragon. I'll let you guys know what the little scaly baby turns out to be.