Pinna muricata is occasionally collected for food by coastal populations.
The shell occurs in various soft bottoms (silty mud, sand, sandy gravel), among rocks, in eel-grass flats or in sandy patches or coral reefs, from low tide levels to a depth of about 40 meters.
Prickly pen shell is usually found subtidally in the soft sediments of seagrass beds where it is partially buried vertically.
Members of the class Bivalvia are mostly gonochoric, some are protandric hermaphrodites. Life cycle: Embryos develop into free-swimming trocophore larvae, succeeded by the bivalve veliger, resembling a miniature clam.
Atrina aequilatera (Martens, 1880)
Pinna (Quantulopinna) muricata Linnaeus, 1758
Pinna aequilatera Martens, 1880
Pinna cancellata Mawe, 1823
Pinna hawaiensis Dall, Bartsch & Rehder, 1938
Pinna semicostata Conrad, 1837
Pinna zebuensis Reeve, 1858
Quantulopinna delsa Iredale, 1939
Quantulopinna delsa howensis Iredale, 1939
Classification: Biota > Animalia (Kingdom) > Mollusca (Phylum) > Bivalvia (Class) > Pteriomorphia (Subclass) > Ostreida (Order) > Pinnoidea (Superfamily) > Pinnidae (Family) > Pinna (Genus) > Pinna muricata (Species)