Piscis Austrinus
Piscis Austrinus is a Southern Hemisphere constellation otherwise known as the Southern Fish. It is one of the 48 Greek constellations originally described by the 2nd century astronomer Claudius Ptolemy (Wikipedia). Piscis Austrinus remains one of the 88 modern constellations defined by the International Astronomical Union (Wikipedia).
Piscis Austrinus (abbrev. = PsA; genitive = Piscis Austrini) covers 245 square degrees or 0.60% of the celestial sphere making it the 60th largest constellation. It contains 47 stars brighter than apparent magnitude 6.5, the brightest star being Fomalhaut.
For more information see the entries for Piscis Austrinus at Wikipedia and U. Wisconsin. For a chart of Piscis Austrinus, see PsA (IAU).