sea urchin larvae is phytotophic. The species of sea urchin differed worldwide. I live in southern China, and the common species here is Anthocidaris Crassispina
Sea urchin larvae can be planktotrophic, lecithotrophic or direct developers. Each of these three developmental strategies has different implications in terms of dispersal and maternal provision. Have a look at the publication by Wray & Raff (1991) Evolution, 45: 1741-1750.