The brightest star in Piscis Austrinus is Fomalhaut. Images made by the Atacama Large Millimeter/submillimeter Array (ALMA) in 2012 revealed a narrow dusty ring probably constrained by a pair of unseen planets. That makes Fomalhaut one of about twenty naked-eye stars to host a multiple-planet system.
ALMA data, in orange, shows a dusty ring (partially imaged) around Fomalhaut. ALMA (ESO/NAOJ/NRAO). Visible light image in blue: the NASA/ESA Hubble Space Telescope