Pipis can also use their siphons to burrow into the sand or mud. This helps them to avoid predators and to find food. When a pipi burrows, it uses its foot to anchor itself to the substrate and then extends its siphons. The siphons are used to draw in water and expel it, which loosens the sand or mud. The pipi then uses its foot to pull itself down into the burrow.
Pipis are important members of the marine ecosystem. They help to filter the water and provide food for other animals, such as fish, birds, and marine mammals.