Flatworms (Platyhelminthes)
Flatworms (Platyhelminthes)
Flatworms (phylum Platyhelminthes) Flatworms are found in marine, freshwater, and even damp terrestrial environments. Most are free-living forms, but many are parasitic on other animals.
https://en.wikipedia.org/wiki/Flatworm
Flatworms (Platyhelminthes)