Flag Pen Shell
Atrina vexillum
- Group: Other
- Typical depth: 0–50 m
- Max size: 48 cm
- For divers: safe
The flag pen shell stands upright in sand and mud, anchored by fine byssal threads, its fragile fan reaching nearly half a metre. The largest pen shell of the tropical western Pacific, it occasionally lines its interior with black pearls.
Taxonomy: Animalia › Mollusca › Bivalvia › Ostreida › Pinnidae › Atrina
Species data via the World Register of Marine Species (WoRMS), AphiaID 216652.
FAQ
- How deep does the Flag Pen Shell live?
- The Flag Pen Shell (Atrina vexillum) is typically found at 0–50 m.
- Is the Flag Pen Shell dangerous to divers?
- The Flag Pen Shell is harmless to divers.
- How big does the Flag Pen Shell get?
- The Flag Pen Shell grows to about 48 cm.