杏吧原创

When you catch a fish, it quite often bleeds bright red blood as it is unhooked. Yet when you gut it, there is virtually no blood and the flesh is a translucent white. Why?

Why aren't hit-and-run attacks common in the animal kingdom? Surely a barracuda or shark could take a meal-sized chunk out of the back or belly of a whale before it could respond. The same goes for smaller pairings of animals.