Question

cambrian web quest
these species, known for the tiny pores in their bodies, flourished in the warm cambrian seas.
mollusks
echinoderms
sponges
arthropods

Explanation:

Sponges are known for having tiny pores (ostia) in their bodies. Mollusks have a soft body and often a shell. Echinoderms have a spiny skin and a water - vascular system. Arthropods have an exoskeleton and jointed appendages.

Answer:

sponges