They’re not related to legumes, but some of these animals release toxic saponins to complement their lackluster immune system. After birth, these animals develop well-defined limbs between the bipinnaria and brachiolaria developmental stages. Millions of these animals involuntarily shed their limbs and disintegrated due to a mysterious wasting disease. Mussel populations on North America’s Pacific coast are controlled by a purple type (-5[1])of these animals in genus Pisaster. (-5[1])The giant triton snail is ecologically important because it acts as the primary predator of a coral-eating species of these animals named for the crown-of-thorns. These animals (10[2])are found (10[1])in class Asteroidea, unlike their closely related “brittle” sister class. For 10 points, identify these echinoderms named for their five arms. (10[1])■END■ (10[1])