Wild oscars are the default type of oscar fish. The original species of Astronotus ocellatus is native to the Amazon River basin, the Paraguay River, the Rio Negro and the Parana River.

The contamination of aquatic environments by microplastic has become a major threat to biodiversity. The presence of microplastic is documented in the aquatic fauna of the oceans, but, in the Amazon ...

©An Oscar, (Astronotus ocellatus), a common aquarium fish originally from South America, seen from a three quarter view. Image via Jón Helgi Jónsson (Amything), CC BY-SA 3.0 http ...

This study aims to evaluate the growth and pigmentation of koi fish (Cyprinus carpio) fed with carotenoids from golden snail eggs (GSE). Fish were fed a control diet (0 ppm), supplemented with 75 ppm, ...