Slugs have four "noses," which are actually specialized tentacles used for sensing their environment. They possess two pairs of tentacles on their head:

• The upper pair contains eyes and helps with sensing light and some smell.
• The lower pair is primarily used for smelling and tasting chemicals in their surroundings.

These tentacles function as sensory organs, allowing slugs to detect smells, tastes, and touch, which helps them navigate, find food, and avoid danger. Although not noses in the mammalian sense, these four tentacles are often referred to as "noses" because of their chemosensory roles

. In summary, slugs have four nose-like sensory tentacles-two pairs on their head-used for smelling and sensing their environment.