Aug 13, 2025
#3050 - Septifer bilocularis - Deck Mussel
AKA Modiola subtriangularis, Mytilus bilocularis, Mytilus nicobaricus Mytilus septulifer, Tichogonia bilocularis, Tichogonia kraussii and Tichogonia wiegmannii, and Box Mussel.
Widespread around Tropical Indo-Pacific cosatlines, and the East and West coastlines of Australia. Frequently found in areas of surf with strong water current, growing attached to rocks, dead corals or the underside of stones, sometimes in dense colonies, down to about 15m below sea level.
Leighton Beach, WA Naturalists Club Centenary Beach Walk, Perth, WA