A U.S. spotted seal escaped from the ocean and lived 620 days in the river, sea animals can also live in the river?

When it comes to seals, we all know that they are a mammal that lives in the ocean, and even in the oceanarium, their living environment is not fresh water.

However, the world is a big place, there is nothing strange, according to foreign media reports, in the United States, there is a "unique" spotted seal, it even tried to escape from the sea to live in freshwater rivers, and rescuers repeatedly re-release it into the ocean, it even found a way to return to the river, then, what is it all about?

A U.S. spotted seal escaped from the ocean and lived in the river for 620 days

The story began in 2018. It started when the US Environmental Protection Agency (EPA) found the seal in its infancy on a small island in Maine, USA.

The staff found that for some reason, the young seal was abandoned by its mother, and it looked very vulnerable, so they rescued it and sent it to an aquarium to be cared for.

However, the signal from the electronic tracker soon showed that the seal had escaped from the ocean and swam to the Hudson River in New York State through the mouth of the ocean, and the seal seemed to be very satisfied with the living environment of the Hudson River.

Later, for some reason, the electronic tracker on the seal suddenly failed to work, and the staff could not find it and were worried about its condition.

Considering that it was originally an animal living in the ocean, the freshwater environment was not suitable for this seal, so the staff once again launched a rescue, and after regaining its health, the seal was released into the ocean, and for fear of it returning to the Hudson River, this time, it was also released into the ocean nearly 400 kilometers away from the Hudson River.

However, the surprising thing happened again, the seal persisted and returned to the Hudson River, and the researcher said that perhaps it was because of the encounter in its early childhood that the seal wanted to live in a place with no natural enemies and plenty of food, so it escaped from the ocean and went to the freshwater river.

It seems that the seal has found the best way of life for itself, however, there are still many problems in doing so. First of all, as a marine creature, it is not suitable for living in fresh water.

So, is there really no seal in the world that can live in fresh water?

This spotted seal in the Hudson River in the United States was an accident, but there is a group of seals living in Lake Bergal in Russia, and they are the famous "Bergal Seals", the only seals in the world that live in fresh water.

However, these seals have evolved over a long period of time to adapt to freshwater life. Research suggests that the reason they live in Lake Baikal is that in ancient times, Lake Baikal was once connected to the ocean, so these seals often traveled between the ocean and Lake Baikal.

Later, with geological movements, the connection between Lake Baikal and the ocean was broken, and some of the seals that could not return to the ocean were left behind in Lake Baikal and evolved over generations to become the only marine mammals on Earth that live in fresh water.

After all, this is a "rare case" in the evolutionary process, and there is a big difference in the nature of this seal. Therefore, researchers believe that it would be responsible to save this seal from the Hudson River and release it back into the ocean.

After all, although spotted seals are widely distributed in the world, their numbers are very scarce, which has made them an endangered species.

However, it has been living alone in the Hudson River for more than 800 days, and if it really returns to the ocean, it may not be able to adapt.

After all, the seal is a very intelligent marine creature, it is very likely to be depressed, so that it does not contact with its companions, and finally depressed to end, so in the end, how to ensure that it can return to the ocean in good health, and good life in the ocean, also need to be well planned, you think?