Many of these skilled chefs are specially trained to avoid being killed while cutting up or preparing puffer fish. Even when expertly prepared, however, eating it can be deadly—and not just for humans.

1. Puffer Fish

these striped little fish have been found to be extremely poisonous. Lionfish can cause temporary blindness in humans if their spines are punctured.

2. Lionfish

Their venom contains a toxin 1,200 times more powerful than cyanide and can kill an adult human within minutes. There is no known antidote and there have been no known cases of successful treatment.

3. Saltwater Crocodile

This jellyfish can be as small as an inch and is capable of killing a human with its venom. However, it’s difficult to spot because it doesn’t move around much.

4. Box Jellyfish

The stonefish is native to Indo-Pacific waters. It has a long, stony dorsal fin that delivers one of its most powerful and painful stings in nature; it’s also coated with poison spikes.

5. Stonefish

You might have seen these adorable little octopuses on shows like Animal Planet or Discovery, but you should remember that just because something is cute, doesn't mean it can't kill you.

6. Blue Ringed Octopus

With its long tail and needle-like stinger, you definitely don’t want to get stung by a deathstalker scorpion. However, if you do end up being attacked by one of these prehistoric arachnids

7. Death Stalker Scorpion

Africa’s black mamba is a big, aggressive serpent that has a neurotoxic venom. Its bite causes paralysis and possible death within 15 minutes if it can’t be treated.

8. Black Mamba Snake

Though they are not aggressive, humpback whales are large and can become quite dangerous if they feel threatened. They can weigh more than 100 tons and be 45 feet long

9. Humpback Whale

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