Green Star Polyp (Pachyclavularia violacea) forms a vivid green carpet of waving polyps over rock surfaces. One of the most beginner-friendly corals, but be warned: it spreads aggressively and is nearly impossible to remove once established.
- Light: PAR 50–200 (very forgiving)
- Flow: Moderate
- Placement: Isolated rock or island only — will overrun neighbors
- Difficulty: Easy