6. The Bull Shark:
This fish is found in all the warm waters that are shallow around the world. It is the deadliest shark that lives in warm oceans. It is aggressive in nature. Since they can adapt to different aquatic ecosystems, they are more likely to harm many humans in the rivers and the lakes as well.
5. The Piranha:
This is an omnivore type of fish. The piranha is common in the South American rivers. They have strong and powerful jaws and sharp teeth. Their meat is tasty…but they are dangerous. The piranha usually attacks anything if they are hungry. The fact that they usually hunt in groups makes it impossible for one to escape if they happen to land on them.
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