5 most lethal fish and their shocking ways to protect themselves

There are incredible creatures existing in the underwater world but some of them can be very dangerous. Some fish may look astonishing but may cause serious injuries because of venomous spines or sharp teeth; some are hard to even see as they blend in so well with the ocean floor; others are super fast and rather hard to escape. From the sting of a stonefish to the bite of a barracuda, each of these fish has its unique way of protecting itself.