Their bodies are soft and they have arthromeres. All molluscs are active with soft muscular feet. These include clams or gastropods, which are a common sight.
Their bodies are bilaterally symmetrical and they have a constitutional structure with a dermoskeleton made of a chitinous substance on the surface of the body. They include prawns or crabs, which are both common
Japanese ghost shrimp
In addition to the molluscs and arthropods, a lot of zoobenthoes such as lugworms, gray mullet and javeline goby inhabit the mud flats at the mouth of the river.
Perinereis vancaurica tetradentata