A characteristic of the island is the large population af common seal.
Actually, Anholt is one of the largest and most important resorts af seals in Europe and likewise, there is a small population of grey seals.
At Totten, a reserve of seals has been established where the seals - unique for Denmark - are visible at close quarters from land.
Earlier, the seals contributed to ensuring the survival of the inhibitants of the island. Today, they are subject to extensive research, and in this context some seals are equipped with satelite equipment, in order that researchers can map their behaviour patterns.