pond-scum parasite (noun)

1. In the comic strip, the villain is portrayed as a pond-scum parasite with slimy tentacles.

2. The artist created a mesmerizing painting of a pond-scum parasite floating on the surface of the water.

3. During the Renaissance, scientists discovered and documented the existence of the pond-scum parasite.

4. In the futuristic novel, the protagonist encounters a mutated and deadly version of the pond-scum parasite.