Shape characteristics of Oncomelania lanfuensis
Austrasiatica langfordi langfordi is a mollusk of Gastropoda. The shell is nearly pear shaped and the helix is involute. The shell is long and narrow, with fine teeth on the outer and inner lips. The mantle is thin and bilobate, and the shell is almost completely covered in the living body. The helix almost disappeared from the adult, but the adult did not. The shell surface is smooth and glossy. The shell surface is dark brown with many small dark spots. There are no stripes on the shell edge and base. It lives in tropical and subtropical warm sea areas, and can be traced from intertidal zone to deep reef, coral reef or sediment seabed. It mainly feeds on algae or corals. This is a kind of rare shellfish which is popular among collectors. The price of each shellfish in the international market is as high as $500 per piece.
It is distributed in the north of Japan and Australia.
It is hermaphroditic. The spawning season is from March to July. The eggs are usually laid in coral caves, empty shells and dark places. After laying eggs, the female does not leave the egg group, but lies on the top of the egg group for deliberate protection until hatching.