Echinoderm Diversity Part 2: Classes Asteroidea and Ophiuroidea (Sea Stars and Brittle Stars)

Moving along with our study of the diversity of the echinoderms, we arrive at class Asteroidea, the sea stars or starfish, and class Ophiuroidea, the brittle stars. How many different kinds of starfish are there? What is their ecological relevance? Let's take a look!