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One adult female alone can produce 1 million eggs in a lifetime and zebra mussel veliger, or larvae, are microscopic and can attach to almost anything in the water.

“Right now, in the northeast district of Nebraska, we have three technicians who are responsible for doing boat inspections, handing out literature and collecting veliger samplings.”

Crassostrea gigas is also an interesting model for developmental biology owing to its mosaic development with typical molluscan stages, including trochophore and veliger larvae and metamorphosis.

Except in Oncidium, there is no longer a veliger stage in development.

From the fact that Aplysia commences its life as a free-swimming veliger with a nautiloid shell not enclosed in any way by the border of the mantle, it is clear that the enclosure of the shell in the adult is a secondary process.