Knock-Knock. Who's There? Carcharhinus tilstoni/C. limbatus Hybrid
An email correspondent of ours isn't showing enough respect for hybrid black-tip sharks as a meaningful illustration of "evolution" in action. He offers the following:
You know we could turn this into a joke.
Q: What do you get when you cross a black-tip shark with a slightly different black-tip shark?
A: All the diversity of life on planet Earth.