Sea Urchins

Synopsis

Underwater scenes reveal the intricate anatomy of the sea urchin. Close-up shots capture its mouth and five teeth as they open and close. After gelatin is injected into one specimen, the shell is removed, exposing its muscle structure, digestive tube, and reproductive organs. Magnified stems show suction cups that allow movement. Microscopic calcareous stems feature jaws with various functions. Cilia are in constant motion, stirring water and debris, while African music plays in the background, suggesting a lively rhythm.