Green Star Polyps

Green Star Polyps (Pachyclavularia violacea), commonly abbreviated as GSP, are legendary in the reefing hobby for their dazzling neon-green color and their nearly indestructible nature. Featuring a purple, rubbery mat from which grass-like green polyps extend, they create a beautiful swaying field in moderate to high flow. Because they are completely undemanding regarding light and water parameters, they are ideal for novices. However, GSP grows incredibly fast and will quickly encrust over any rockwork it touches, potentially smothering other corals. It is highly recommended to isolate GSP on a dedicated 'island' rock in the sand bed to control its spread.