The history of the evolution of sea lions and seals is interesting to investigate. Paleontologists are still actively studying how creatures similar to otters and with a relationship to bears have evolved into these amphibious marine mammals. Here is a description of why sea lions and seals cannot live permanently in water, cited from smithsonianmag.com on (8/5).

Other influences on the body decomposition process include reducing the chance of fossilization compared to marine mammals that die offshore and sink to the relatively calm ocean floor, where they can be buried. However, despite facing these challenges, paleontologists have successfully discovered various types of prehistoric seals that exceed our expectations when thinking about seals and their relatives.

Puijila swims by propelling its body through water using adapted arms and legs, not by pushing its backbone like whales and otters do. This discovery provides insights into the early behavior of seals. Recently, experts have considered the possibility that seals, sea lions, and walruses currently have two different ancestors.

Perhaps initially, sea lions were land creatures that took a very long time to adapt to life in the water. Puijila may reflect an early form that was trapped, not a direct ancestor that was trapped. Although sea lions and seals are not direct descendants, they represent ancestors that were trapped in the past. Paleontologists know this based on the discovery of Enaliarctos remains that are the same age as sea lions, about 24 million years ago.

Anatomy of sea lions shows that 21 million years after whales began living in the sea, sea lions also started doing so. Over the following millions of years, various species of sea lions evolved, some of which are very different from those that still exist today. Sea lions originating from the Arctic in ancient times have spread throughout the world's oceans for millions of years and currently include at least 34 types from pole to pole. Although most spend months in the ocean searching for food, each type still relies on land for reproduction.

When they grow, seals find a more abundant food source in the waters. In addition, their ability to seek shelter on land is a practical way to avoid marine predators. Seals face challenges from predators such as toothed whales, carnivorous animals, and large sharks, which are considered their prey. However, with the abundance of food sources along the coast and the ability to seek shelter on land, seals reach their peak in the process of evolution.

According to Churchill's notes, "various sea lions are significantly associated with areas that have high productivity and strong currents." Major changes in evolution are often illustrated as periods in which living creatures adapt to their new environment. Sea lions have developed a series of adaptations to survive in the water. They adapt to their life by swimming in the sea and sunbathing on the coast.