You can't tell, depending on the species it is. They can basically be any colour.
no
True
Neither. while its true that moon snails consist of only one shell, they are classified as gastropods and not bivalves. Bivalves are clams, mussels, scallops and oyster, all having 2 shells, while gastropods are snails.
no
Yes
no, they have seven
Yes, it is true that the acidic ocean water will erode the calcium carbonate shells.
true
true
True
true
Sea snails eat moss and some plants that grow in water. that is a true answer that is not a lie it has been looked up soo yeah
true
Yes slugs are decomposers