What is the worlds slowest seal?

The world's slowest seal is the harbor seal (Phoca vitulina), which typically swims at speeds of around 5 to 6 miles per hour (8 to 9.7 km/h). While they are capable of short bursts of speed when threatened, their leisurely pace allows them to conserve energy while foraging for food. Harbor seals are commonly found in coastal waters and are known for their spotted coats and social behavior.