Flatworms

Flatworms are flat and leaf-shaped. They are very thin, flexible and almost transparent. Usually, they slide over rocks but can swim beautifully by undulating like a stingray. They are carnivorous. The mouth is in the middle of the underside of the body. They eat dead animals or capture small invertebrates alive by wrapping themselves around their prey and entangling it in slime.

Video by Frances Whitfield