The famous animal the "Porifera", has 6 body openings.
Adult echinoderms only have one body opening. Their larvae have two.
The mollusca have two body openings, the mouth and the anus are separate
Just one, called the pharynx.
2 2
3
4
Reptiles have 2 body openings. Mouth and an anus.
2
4
7
1
12
2
Why are you looking for an opening?
There are many animals that are not in the Mollusca phylum. Birds, starfish, butterflies, jellyfish, and worms are not part of the Mollusca phylum.
Ostium.
12 i think
mollusca(phlum)