Here's why:
* They breathe through a blowhole: Dolphins are mammals, and they breathe air through a blowhole on top of their heads. Bringing their snout out of the water would expose their blowhole and make it difficult to breathe.
* They are adapted for underwater feeding: Dolphins have evolved specialized adaptations for catching and eating prey underwater. This includes:
* Echolocation: They use sound waves to locate and identify prey in the water.
* Teeth: Their teeth are designed for catching and holding fish and other marine creatures.
* Powerful jaws: They can open their mouths wide and have strong jaws for biting and swallowing prey.
So, dolphins are perfectly equipped to find, catch, and consume their food entirely submerged in water.