crazyin73
contestada

Sea urchins are spiny, globular animals that live on the ocean floor. How are sea urchins classified?
A. vertebrates

B. invertebrates

C. mammals

D. arthropods

Respuesta :

Ruos4476

Answer:

B

Explanation:

because they belong to classe Echinoidea, phylum echonodermata

KiaraKitsune

Answer:

B

Explanation:

They have no bones, and therefore, they are classified as a invertebrate(s).