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The Most Dangerous Fish of the Sea

Updated on March 12, 2011

There are lots of hazardous fishes in the sea. If you managed to get hit by any of them then chances are there that you’ll get serious injuries or temporary damage to your body because of toxic or bite. If you get bite from the fishes mentioned in this hub then you need to seek medical attention immediately.

Angler Fish

Credit: Ms Kaiter
Credit: Ms Kaiter

Deep sea angler fish emits light from their esca to attract prey. Because of this method of predation it is called as angler fish. Though it is dangerous and often red listed in many parts of the world but it is preferred for cooking in korea and japan.

Lion Fish


Lionfish has venomous spines that can cause paralysis or temporary damage to wounded area. If you get attacked by lionfish then you need to keep that part of the body under hot water and need to seek medical attention quickly. Though lionfish rarely attacks on human unless provoked so be careful with them if you wish to keep them in aquarium.

Stone Fish

Credit: Aquaviews
Credit: Aquaviews

It’s really hard to notice stone fish if it’s lurking around any coral reef or live rock. It’ll attack if you get close to it and you’ll be surprised at what is attacking you. It is one of the poisonous fish in the world and it is really hard to find out where is this fish even if you look closely at sea bottom and coral reef, rock.

Snakehead Fish | Credit: Plantedtank
Snakehead Fish | Credit: Plantedtank
Viper Fish
Viper Fish
Grenadier Fish
Grenadier Fish
Box Jellyfish
Box Jellyfish
Sea Urchin
Sea Urchin

Snakehead Fish

Sneakhead fish is dangerous to both humans and the other fishes in the sea. Reproduction rate of the sneakhead fish is very high and unless controlled could cause lot of trouble in any lake or pond. Their size grows to 2-3 feet and can easily attack mice, cat and birds near water. They also survive outside water for longer period of time.

Viper Fish

They’re usually found in the deep sea at depth of about 1500 to 9000 ft. If you ever get close to them then chances are you’ll get them to attack on your finger or other body part. They’ll grow up to the size of about 24 inches and are considered as highly aggressive.

Grenadier Fish

Not even worth to mention that how much dangerous they are. They can grow up to 5ft and that makes it really hazardous for humans to go in the region where these fishes live. They’re middle dwellers and are found in Atlantic ocean.

Box Jellyfish

They’re famous for their deadly tentacles. They’re also known as “ deadly box or box of death”. It has up to 60 tentacles and 5k million stinging cells. They’ve translucent body which makes it hard to spot them under water.

Sea Urchins

Sea urchins have a long sharp spines which are venomous. You’ll find them like a glossy bonsai spine tree but urchins are one of the most deadly creature in the sea. Flower urchin is one of the most deadly species which can cause paralysis or even death.


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    • profile image

      jose zacharia India 

      5 years ago

      The information is very interesting, thanks. But I am sorry to say you didn't mention which part of them is poisonous or dangerous, and how they are injecting their poison to humans. A little more information would have been much more appreciable. Lot of thanks for this article.

    • srsddn profile image


      5 years ago from Dehra Dun, India

      skyfire, these seem to be really dangerous. I was attracted by Puffer fish, which is also very poisonous. It is interesting to watch co-existence of all type of fish in the sea. Thanks for sharing information about dangerous fish.

    • profile image


      5 years ago

      Super cooool

    • profile image


      6 years ago

      When I was 15 years old we went to shell Island in Panama City Beach FL. Me being from MI I guess I didn't know that much about oceanic creatures. I kept picking up Sea urchins over and over. finally a local told me they are poisonous. that they don't normally let a barb loose unless they feel threatened. even scarier i was like 25 mins from shore not one of the brightest things I have done but I am fine and its kinda cool to think I held the most deadly sea creature in the world.

    • profile image

      Ranjith R.Pillai 

      6 years ago

      It's awesome. Given pictures are superb and good description

    • profile image


      7 years ago

      very cool

    • profile image


      7 years ago


    • profile image

      lucia natocyad 

      7 years ago

      wow great

    • profile image


      8 years ago

      Viperfish & Snakehead fishes lookl aggressive

    • Lensflare profile image


      8 years ago

      I had to look twice to see that stonefish in the picture. Scary fishies!

    • Richard Armen profile image

      Richard Armen 

      8 years ago

      Cool hub!

    • thevoice profile image


      8 years ago from carthage ill

      Terrific great hub pictures read thanks much

    • kowality profile image


      8 years ago from Everywhere

      I've seen some of these fishies while scuba diving. Awesome hub and pics.

    • Pamela99 profile image

      Pamela Oglesby 

      8 years ago from Sunny Florida

      Wow! Those pictures make me want to stay on the beach. The colors are beautiful and the hub is very interesting as well. Good hub.

    • Michael Shane profile image

      Michael Shane 

      8 years ago from Gadsden, Alabama

      Awesome hub & creepy critters....


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