Asteroidea (sea stars and starfishes) (1,860)   (2)
Crinoidea (feather stars and sea lillies) (105)
Echinoidea (heart urchins, sand dollars, and sea urchins) (998)
Holothuroidea (sea cucumbers) (1,677)
Ophiuroidea (basket stars, brittlestars, and snake stars) (2,071)

(...) = Species count
(...) = Endangered count
(...) = Invasive count