| They then develop into a fully shelled veliger larvae, also known as the late umbo stage, which have a hinged side and a velum, formed within 12 to 24 hours. |
| Phototaxis and vertical migration of the queen conch veliger larvae. |
| During this time, the shelled veliger larvae use their ciliated vela to capture food and swim. |
| Except in Oncidium, there is no longer a veliger stage in development. |
| Torsion takes place during the veliger stage, usually very rapidly. |
| There is a veliger stage in development, but the velum is reduced. |
