Having cake and eating too: The benefits of an intermediate larval form in a brittle star sp. opaque (Ophiuroidea).

Most marine invertebrate larvae either obligately feed or depend on maternally provided reserves during planktonic development. A small number of species have the capacity to do both, in a mode of development known as facultative planktotrophy. We describe facultative feeding in a larva from the Oregon coast, and identify it as being an undescribed species in the genus , which we refer to as sp.