20% of all the fresh water flow into oceans of the world is from the Amazon. Almost 1,850 species of fish live in Amazon, which include the catfish family.

First of all, let me introduce briefly, some of the catfishes in the Amazon.

First of all, Gilded Catfish – longer than 4feet, 220 pounds weigh and had large flat head.

Secondly, Red-tailed Catfish- more than 3feet, over110 pounds weigh and massive head with strong bones.

Third, Laulau Catfish- like other catfish, head big head with small eyes, 6and half feet, over 650 pounds weigh.

These giant catfish migrate to headwater in the Amazon liver and spawn and have larvae. They travel back to the place where they live and grow up until being mature to lay eggs again.

However, the research reported that current dams interrupt catfish's seasonal journey to be completed. The researchers were surprised that even though these species are well known to spawn a lot of young, very few catfish larvae were found in the Madeira basin in comparison to previous studies.

In Brazil, currently hydroelectric power plants have already constructed in two parts of Madeira , which is Antonio and Jirau. These dams are expected to affect the long range migrating species, which obstacle their lifecycle.  

Source : Animals by Demand media