Pacific Walrus vs. Southern Elephant Seal

Attribute	Pacific Walrus	Southern Elephant Seal
Scientific Name	Odobenus rosmarus	Mirounga leonina
Location	Arctic Ocean	Antarctic region
Size	Up to 11 feet long	Up to 20 feet long
Weight	Up to 1.5 tons	Up to 4 tons
Diet	Benthic invertebrates	Fish and squid

Physical Characteristics

The Pacific Walrus and Southern Elephant Seal are both large marine mammals, but they have distinct physical characteristics. The Pacific Walrus is known for its long tusks, which are actually elongated canine teeth that can grow up to 3 feet in length. These tusks are used for a variety of purposes, including digging for food and hauling themselves out of the water onto ice floes. In contrast, the Southern Elephant Seal is characterized by its large size and trunk-like proboscis, which is present in adult males and used to make loud roaring noises during mating season. Additionally, Southern Elephant Seals have thick blubber layers that help them stay warm in cold waters.

Habitat and Range

Both the Pacific Walrus and Southern Elephant Seal are found in the cold waters of the northern and southern hemispheres, respectively. The Pacific Walrus is primarily found in the Bering and Chukchi Seas, as well as along the coasts of Alaska and Russia. They are known to inhabit sea ice and shallow waters where they can find their preferred prey, such as clams and other benthic invertebrates. On the other hand, the Southern Elephant Seal is found in the sub-Antarctic and Antarctic regions, with breeding colonies located on islands such as South Georgia and Macquarie Island. They spend most of their time at sea, diving to great depths in search of fish and squid.

Diet and Feeding Behavior

Both the Pacific Walrus and Southern Elephant Seal are carnivorous animals, but they have different diets and feeding behaviors. The Pacific Walrus primarily feeds on benthic invertebrates such as clams, snails, and worms, which they suck up from the ocean floor using their sensitive whiskers. They are known to dive to depths of up to 300 feet in search of food. In contrast, the Southern Elephant Seal feeds on a variety of fish and squid, which they catch by diving to incredible depths of up to 5,000 feet. They are able to hold their breath for long periods of time, allowing them to hunt in the deep ocean waters.

Social Structure and Behavior

Both the Pacific Walrus and Southern Elephant Seal are social animals that exhibit complex behaviors within their respective groups. Pacific Walruses are known to form large herds, especially during the breeding season, when males compete for dominance and access to females. They are also known to be vocal animals, using a variety of sounds to communicate with each other. Southern Elephant Seals, on the other hand, have a more hierarchical social structure, with dominant males controlling access to breeding females. They are known for their aggressive behavior during mating season, with males engaging in fierce battles to establish dominance.

Conservation Status

Both the Pacific Walrus and Southern Elephant Seal face threats to their populations due to human activities and environmental changes. The Pacific Walrus is listed as a species of "least concern" by the IUCN, but they are still vulnerable to habitat loss and climate change, which are causing a decline in sea ice and impacting their ability to find food. Southern Elephant Seals, on the other hand, were once hunted to near extinction for their blubber and oil, but conservation efforts have helped their populations recover. They are currently listed as "least concern" by the IUCN, but they are still at risk from entanglement in fishing gear and pollution in their marine habitats.