A family of fresh water fish in the order CHARACIFORMES, which includes the Tetras.

A group of cold-blooded, aquatic vertebrates having gills, fins, a cartilaginous or bony endoskeleton, and elongated bodies covered with scales.

The largest genus in the family Myxobolidae, class MYXOSPOREA, containing over 400 species.

Large natural streams of FRESH WATER formed by converging tributaries and which empty into a body of water (lake or ocean).

I'm sorry for any confusion, but "Brazil" is not a medical term or concept, it is a country located in South America, known officially as the Federative Republic of Brazil. If you have any questions related to health, medicine, or science, I'd be happy to help answer those!

The contents included in all or any segment of the GASTROINTESTINAL TRACT.

Infections with unicellular organisms formerly members of the subkingdom Protozoa. The infections may be experimental or veterinary.

Water containing no significant amounts of salts, such as water from RIVERS and LAKES.

Paired respiratory organs of fishes and some amphibians that are analogous to lungs. They are richly supplied with blood vessels by which oxygen and carbon dioxide are exchanged directly with the environment.

Divisions of the year according to some regularly recurrent phenomena usually astronomical or climatic. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)