When it comes to the Amazon River, it can be said that everyone in the world knows everyone. It is the second longest river in the world, after the Nile, with a total length of more than 6,400 kilometers. Although the length is not the first, it is a veritable first in terms of its flow rate and the number of tributaries.
The Amazon accounts for about 20 percent of the world's river flows, more than the Nile, Mississippi, and Yangtze rivers. Its tributaries are also the largest, with more than 15,000, of which the longest is the Madera River, which is 3,200 kilometers long.
The Amazon basin covers much of South America, creating the largest rainforests and the largest tropical plains. The diversity of the climate has created millions of creatures here, and most of the world's ornamental fish are produced here.
Illustration: Piranhas
When it comes to fish, perhaps the most famous of the Amazon basin is the piranha, which is ferocious and devours humans, which makes it famous and frightening.
But even such an indomitable piranha can only rank fourth in the Amazon basin's lethality rankings, and the first fish has a unique trick against piranhas, it is the catfish.
The spiny catfish belongs biologically to the genus Spiny catfish of the order Catfish in the order Catfish with a body length of about 40 cm. Nominally, it is a catfish with long spines.
Photo note: Catfish prickly
When powerful aquatic fish face swarms of piranhas, the frontal hardness should not be beneficial, and the same is true for catfish. However, when surrounded by piranhas, the clever catfish will burst out of the siege and swim to the bottom of the piranha school to find the bottom of a piranha. Just following its movements, not giving the piranha a chance to bite it, even if other piranhas want to bite it, it will open the spines on its body, so that they have nowhere to mouth, and over time, the piranha sees that it has no impulse to move!
Catfish are covered with sharp spikes that lie on top of their bodies when they are not normally used, and they come in handy when encountering predators. When the danger is approaching, it will rush out of the water as fast as possible, breathe in the air, let the body expand and float, its abdomen lies on its back in the water, and part of the body is exposed to the water, so that it can defend against the enemy's halberd, and after the danger has passed, it will release the air in its stomach, and the body will return to its original state.
The reason why it is the most lethal animal may be because it is covered with spikes, and whoever wants to prey on it will have to pay a painful price, even if it does not die, it is seriously injured!
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