Sharks are one of the ocean's most notorious predators, but they are reluctant to "collide" with dolphins.
To most of us, dolphins are gentle creatures. However, in reality, dolphins can be extremely aggressive when threatened, especially when swimming in a pod.
Therefore, if a shark encounters a pod of dolphins, it will be easily defeated. In addition, due to the physical characteristics of the two species, in a one-on-one fight, sharks are no match for dolphins.
Dolphins can move quickly and flexibly thanks to their vertically oriented hind fins, soft skin, and flexible joints. Dolphins can swim faster than most sharks. Sharks, on the other hand, have horizontally oriented fins, so they are less flexible than dolphins.

Dolphins have very hard, strong and thick snouts. When within a few meters of a shark, the dolphin will charge and ram its snout into the shark's soft belly at full speed. This collision can cause serious internal injuries to the shark, even death.
Sharks are solitary hunters, while dolphins travel in groups. When one of the group is in danger, the other dolphins will rush to its defense.
Orcas are the largest members of the dolphin family. When food is scarce, they also hunt great white sharks. Using their powerful tail fins, orcas will flip the sharks over, immobilizing them, and then enjoy their meal.
There are still some cases where sharks are too hungry or food is scarce, they can attack dolphins that swim away from the school.