Are mollusk larvae parasitizing fish?

The type of mollusks combines several classes, but representatives of only one of them have larvae in their life cycle, which parasitize on fish during their development. In the class bivalve molluscs there is a species of toothless, in its life cycle there is a stage of a larva that clings to a fish, develops in its body and reaches the stage of a mollusk, gets out and settles to the bottom. Such a maneuver is used for the spread of individuals and the development of new territories. In individuals of other species, the larvae swim in the water, then fall to the bottom and continue their development there. And some do not even have a larval stage at all, and a mollusk immediately appears from the egg.