A mother's gift: Plastid-derived structures help sea urchin development and dispersal

During the development of marine organisms—from fertilization through to juvenile stages—it is often observed that the eggs released into the water column are initially supplied with only a small fraction of the energy they require. The remaining reserves needed for growth must be obtained from the environment through filtering food—like phytoplankton—from the water column. This strategy of providing many eggs with only a small amount of energy each often leads to the loss of almost all potential offspring.