Palaemon australis is a common shrimp found in the Southern Hemisphere. It is also known by several other names, such as the southern shrimp, southern river shrimp, and Australian river prawn. The Palaemon australis is a freshwater species that inhabits rivers, streams, and estuaries, and it is usually about 50mm in length. Its body is transparent, and it has a brownish or greenish tint. Its many synonyms include Macrobrachium australiense, Palaemon australiensis, and Palaemon affinis. The different names for this shrimp are used interchangeably depending on the area of origin and the taxonomic classification system used. Nonetheless, they all refer to the same fascinating crustacean.