10 Deadliest Fish in the World

By Manish Choudhary

Stonefish, found in the Indo-Pacific, have venomous spines. If stepped on, they can cause severe pain, swelling, and even death if not treated quickly.

1. Stonefish

Box jellyfish, not fish but marine creatures, have tentacles with toxins. Their sting can be very painful and, in some cases, lead to fatal heart failure.

2. Box Jellyfish

Certain pufferfish, like Japanese fugu, have toxins in their organs. Eating them wrong can cause paralysis and death. 

3. Pufferfish

Toothpick fish, or candiru, are parasitic catfish in South American rivers. They're notorious for entering body openings, causing serious health problems.

4. Candiru

Lionfish, originally from the Indo-Pacific, now invade places like the Caribbean. Their venomous spines can bring pain, nausea, and breathing problems to humans.

5. Lionfish

Goliath tigerfish, in the Congo River basin, is a big predator with sharp teeth. It's aggressive and has a strong bite, although attacks on humans are rare.

6. Goliath Tigerfish

Electric eels, not actual eels but knifefish, give electric shocks for hunting and defense. While not usually deadly to humans, a strong shock can cause cardiac arrest.

7. Electric Eel

Snakehead fish are aggressive and can breathe air. In some places, they disrupt local ecosystems as invasive species.

8. Snakehead Fish

Red lionfish, like the common lionfish, have venomous spines. They're invasive in the Atlantic and Caribbean, endangering native marine life.

9. Red Lionfish