Are fish mammals and give Live birth?

No, fish are not mammals; they belong to a different class of animals known as Pisces. Fish are cold-blooded, have gills for breathing underwater, and typically lay eggs. In contrast, mammals are warm-blooded, possess mammary glands for nursing their young, and usually give live birth, although there are some exceptions among certain species like monotremes. Therefore, while some mammals do give live birth, fish do not.