Fish Diseases and Management

4.1.2.6 Mollusca

Larval stage of fresh-water bivalve molluscs is known as glochidia, which are obligatory parasites in fish. The glochidia larva released by the adult mollusc finds a suitable fish host and hold tightly on to the gills, fins or skin. These would later metamorphose to form a free living juvenile mollusc.