The popular image of otters holding hands while they sleep has captured widespread attention. This behavior, often depicted in media, prompts curiosity about its authenticity and underlying reasons. This article explores the reality behind this unique behavior and the purposes it serves for these marine mammals.
The Truth About Otter Paws
Sea otters (Enhydra lutris) are known for the behavior of holding paws while resting or sleeping on the water’s surface. They primarily do this while floating on their backs, a common posture for conserving energy. They often engage in this hand-holding while grouped together in what is known as a “raft,” ranging from a few to hundreds of otters. This intertwining of limbs helps them maintain contact.
This behavior distinguishes sea otters from other otter species. River otters (Lontra canadensis), unlike sea otters, typically sleep on land in dens near riverbanks. Thus, the image of otters holding hands while adrift is primarily associated with sea otters, highlighting an adaptation to their aquatic lifestyle.
The Purpose Behind the Paw-Holding
Sea otters holding paws serves several ecological and social functions. One primary reason is anchoring. By linking paws, otters prevent themselves from drifting away from their group or into dangerous areas, such as open seas or strong currents, while resting. They also anchor themselves by wrapping kelp around their bodies, providing a natural tether.
Staying together in a raft offers safety and security for the group. This collective arrangement increases vigilance against predators, as multiple otters are more likely to detect danger than a solitary individual. The presence of others can also deter threats, providing collective protection.
Mother sea otters hold their pups close, often cradling them on their chests or holding their paws, to keep them from drifting away. Newborn pups are buoyant and cannot swim directionally, making this maternal action crucial for their safety and bonding. This contact ensures the pup remains secure while the mother rests or forages nearby.
Maintaining raft integrity is another benefit of this behavior. Holding paws helps sustain group cohesion, particularly during rest when individuals might otherwise scatter. This social behavior supports their communal living and contributes to the stability of the group.