Is a great white shark mammal?

No, a great white shark is not a mammal. It is a fish.

Here's why:

* Fish breathe underwater using gills. Great white sharks, like all fish, have gills that extract oxygen from water.

* Mammals breathe air using lungs. They have lungs that allow them to breathe air from the atmosphere.

* Fish are cold-blooded. Their body temperature changes with the temperature of their surroundings.

* Mammals are warm-blooded. They maintain a constant internal body temperature.

* Fish reproduce by laying eggs.

* Mammals give birth to live young.

Great white sharks may be large and powerful, but they are ultimately fish, and share many characteristics with other fish species.