Hi guys!!!
Some of my friends took pics of a beautiful stream...
The stream is typically Amazon, substrate of sand and dried leaves, roots and many
Nymphaea, the water is tinted by tannin of many submerged logs and they also finded growing emerged
Tonina fluviatilis in abundance in areas close to water.
Some pics of there...

The place...

Underwater pics...

Underwater...

Underwater -
Crenicichla sp.

Underwater -
Apistogramma agassizi 
Underwater -
Hyphessobrycon sp.
They also caught some fishes and used a tiny tank just to take some pics...
Monocirrhus polyacanthus
Carnegiella strigata
Potamorrhaphis guianensis
They took about 31 pics, the rest of them are here and the article is already translated to English -
Shipping in Igarapé-Miri