If you click the 'Flag' by mouse, its mollusk postage stamps will be showed.

Malta

Czhechoslovakia

Romania

Japan

Sierra Leone

Papua
NewGuinea

Vietnam

Cuba

Madagascar

Australia

Marshall Islands

Nicaragua

Refference Materials
'The creature of an aquarium, Pocket pictorial book' Edited by Yoshitaka Abe, Issued from Syufu no Tomo Company, 1993year October.

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