The 'vampire fish' has 4 hearts

Blind fish is a strange creature with a primitive circulatory system with 4 hearts. They live on parasites on other animals by sucking on the blood of these animals.

Fear of 'vampire fish' has 4 hearts

The species of blind fish (grouper) in English is Hagfish, popularly called greasy eel. However, according to scientists, they do not belong to the eel family but belong to the superficial class of non-fish . This is a strange creature with a primitive circulatory system with 4 hearts. A working heart like the main pump, the remaining three hearts are three sub-pumps.

This bizarre blind fish cannot see prey with their eyes but they can still be detected by a special way to suck blood and kill prey. Blind fish or stone grouper, also known as ' vampire ' has a length of 60cm to 90cm. They look like eels, but their behavior is like leeches.

Rocky grouper lives on other animals by sucking on the blood of these animals . Rocky grouper has a round mouth with lots of teeth growing around the mouth. They use their round mouths to cling to the skin of other fish, bringing their sharp, sharp tongues through the scales to suck blood. The prey often dies after being sucked by bloody grouper.

In the past, stone grouper only appeared in the Atlantic Ocean. However, in the nineteenth century, the fish reached the Great Lakes, USA after the Erie canal was dug. With extremely high adaptability, this fish has existed and developed very quickly in freshwater environment and became the culprit causing the decline in the number of many other fish species in this lake.

An estimated 76 blind fish species live in cold waters around the world . They can be found at a depth of 1.7 km, near the sea floor with a soft substrate, where this fish can bury itself if threatened. The largest blind fish named Eptatretus goliath is up to 4m long, and the smallest blind fish is only a few centimeters.

Grouper also takes water through the nasopharynx tube, leading to their throat and gills. Different individuals have different bearing numbers, usually between 5 and 15 pairs of bearing. The skin of blind fish has small capillary networks that allow breathing when buried in the mud.

In addition, rocky grouper also has some unusual points like their skin that are described as a smooth toe socks with colors that vary from species to species, from pink to blue-gray. However, because they are too much mucus, they are often mistaken for oily skin.

The number of "vampire fish" sucking on the blood of other animals flourishes at a rapid rate that threatens the lives of many aquatic creatures. Therefore, people use many methods such as fishing, catching fish, spraying chemicals into streams, laying nets downstream of streams to prevent their migration, releasing males without fertility to reduce muscle. mating of children . to destroy this scary fish.