Some fish species live in the harshest place on earth

At a depth of hundreds of meters, on the crater, sulfur lake or in hot water lakes, there are still many strange fish species in the world.

1. Buffalo tongue fish lives under 'earthly hell'

At a depth of thousands of meters below the ocean floor, where underground volcanoes are still active. Temperatures can reach 186 degrees Celsius, sulfuric gases and other deadly poisonous gases are constantly being erupted.

Not only volcanoes, but also dense reservoirs of large and small sulfur. Such environmental conditions are thought to be impossible to survive with any creature. However, the scientists were surprised to find a lot of buffalo fish (Symphurus Alexasatium) individuals living here.

The number of buffalo fish found is even more than 100 times more than elsewhere on the continental shelf. At buffalo fish sulfur reservoirs, they still swim casually, even when they are crowded. Until now scientists still cannot explain exactly how the buffalo fish can survive in such a dead environment.

2. Killifish shallow fish

Water is an irreplaceable habitat for most fish species on the planet. When the habitat is dehydrated they will weaken and die soon after. However, the fish named Killifish have the ability to survive very long even when the environment does not have water.

When the environment is dehydrated, Killifish seeks to keep the body moist by getting into the old tree trunk, the hollowed-out coconut tree or hiding under the fallen leaves. In this way Killifish body does not lose water and they can live like that for up to 66 days.

Their bodies still maintain their metabolism, so they are not exhausted. Killifish's skin has a special ability to help them exchange air and maintain the body's necessary salt.

3. Mummichog fish can live miraculously

In any environment they can live and grow well - that is the conclusion of fish scientists named Mummichog (Fundulus heteroclitus) - from polluted rivers, oiled seas. spreading to bays containing PCBs - substances that cause liver damage and cause high mortality.

In those environments, Mummichog can live a healthy normal life. Even when conditions lack oxygen, they can still breathe on the water or transform their blood to enhance their ability to exchange gas. Mummichog fish may still live in a zero gravity environment as usual.

4. Pupfish fish immersed in hot water

People are advised not to take a hot bath over 40 degrees Celsius. Some cases of stroke when taking a hot bath are higher than 43 degrees Celsius.

In the dead valley in the United States, the streams here always have a very high temperature of about 47 degrees Celsius. At such temperatures almost no species can withstand.

In fact, no one is found here except for Pupfish. Over the past 20,000 thousand years, this fish is still alive and well here. Not only that, scientists also discovered that Pupfish is also capable of being tolerant of salinity. In hot water environments, they live salinity 4 times higher in the oceans.

5. Mexican blind cave fish

Mexican blind cave fish (Astyanax mexicanus) lives in dark caves for a lifetime so their visual parts dissipate so they don't have eyes. However, in order to survive the dangerous ocean floor, they develop a transcendental sensory ability.

All types of fish have an organ called "lateral line" that runs the length of the body, enabling them to detect vibrations and currents of surrounding water. But this organ in the blind fish is thought to be the most developed.

Blind cave fish can sense obstacles even when they are motionless just by swimming around the object. Even scientists believe that blind fish can build a map of what is around them as clearly as we see it.

6. Arowana - Dragon fish

Arowana live at a dark depth of 600m of the ocean. They are 16cm long, slippery, sharp teeth, on the arowana's body have a photophore to attract prey, it only needs to wait for the prey to get close and catch it. Arowanas can either emit blue light or red light, unlike other deep-sea animals that often only produce blue light.

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