Any animal is only strong in certain territories. And the shark’s mistake was being too “curious” of the other’s area.
Sharks and crocodiles are the top carnivores in the aquatic environment and have separate habitats, so there is rarely a conflict between them. However, for rivers flowing into the sea, it is not uncommon for crocodiles (salt water) to swim to the sea to feed.
A shark has swam into brackish water with the intention of looking for food, unexpectedly it encountered an extremely scary predator of this place, a crocodile. When detecting a stranger breaking into his area, the crocodile quietly approached and dealt a decisive blow.
Sharks are a rare opponent in the ocean, so they did not expect that there is such a scary creature in the small river. Finally, sharks became food for crocodiles, ending the days of wandering in the vast ocean.