Why sharks are afraid of dolphins?

Dolphins are mammals that live in pods and are very clever. They know how to protect themselves. When they see an aggressive shark, they immediately attack it with the whole pod. This is why sharks avoid pods with many dolphins.

Do dolphins Fight sharks for no reason?

The main advantage dolphins have against shark attacks is safety in numbers; they stick together in pods and defend one another from a shark's attack by chasing and ramming it. Dolphins are able to protect vulnerable members of their pods and extended families such as young dolphins and injured or sick dolphins.