The animals which are soft bodies, move freely or attached to anything, covered with shell or without shell and live in pond, lake, river, ocean are _____?

The animals you're describing are mollusks, a large phylum of soft-bodied invertebrates. They include diverse aquatic and terrestrial animals like snails, clams, mussels, and octopuses, and their bodies are often protected by a shell, though some, like slugs and octopuses, do not have a shell. They live in freshwater and marine environments and are characterized by a muscular foot for movement, a visceral mass containing their organs, and a mantle that often secretes a shell.