Starfish are echinoderms that lack stomach and blood. They are known for their star-shaped bodies, multiple arms, tube feet, and wide coloration. In this list, we’ll tackle the major types of starfish, discussing their distribution, biology, and amazing facts.

From the regal Red Sea Urchin to the peculiar Pencil Urchin, discover the distinct characteristics, behaviors, and diets of 15 sea urchin species living in our oceans. Educate yourself about this tiny spiky marine creatures and learn how to support conservation efforts to protect their populations.

From Vancouver and Seattle Aquariums.