Sea Turtle in pen and ink

This week's Illustration Friday prompt is hatch. And this is a sea turtle. Of some sort. The source I got my resource photos from didn't say which species.

My apologies to anyone who actually knows more about turtles than I do (which is... a lot of people, really. I'm a mammalogist by training. I like reptiles, but that's about as far as my expertise goes) for the lack of detail. I was just hoping to get enough to give the idea of the face. For whatever reason, it amuses me that baby turtles are born already looking mildly peeved about the world they've ended up in.

Yeah, I don't know either.