Echinoderms and Chordates: Introduction to the phylum and fishes ...

While snorkeling, you come across an
animal that is bilaterally symmetrical,
has segments, a coelom, does not molt,
and whose blastopore forms the mouth.
The animal could be a/an:
a. Chordate
b. annelid
c. mollusk
d. arthropod
e. echinoderm