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 (-5[1])due to a mysterious wasting disease. (10[1]-5[2])Mussel populations (-5[3])on North (10[1]-5[1])America’s Pacific (10[1])coast are controlled by a purple (-5[2])type (10[1]-5[1])of these animals (10[1]-5[3])in genus (10[1]-5[2])Pisaster. (10[1]-5[3])The (10[1])giant triton (10[2])snail is ecologically important because it acts as the primary predator of a coral-eating (10[1])species (10[1])of these animals (10[2])named for the crown-of-thorns. (10[2])These animals (10[4])are found (10[1])in class Asteroidea, (10[1])unlike their closely related “brittle” sister class. (10[1])For 10 points, identify these (10[1])echinoderms (-5[1])named for their five arms. (10[6])■END■ (10[12])