Which animal can survive the longest without oxygen?

The animal that can survive the longest without oxygen is the tardigrade, also known as the water bear. Tardigrades are microscopic, eight-legged animals that can be found in a variety of environments, from mossy forests to the deep sea.

One of the most remarkable features of tardigrades is their ability to enter a state of suspended animation when conditions are unfavorable. In this state, they can survive extreme temperatures, radiation, and even the vacuum of space.

When it comes to surviving without oxygen, tardigrades are capable of reducing their metabolism to almost zero and entering a state called cryptobiosis. In this state, they can survive for decades without water or oxygen. Some species have been known to survive in this state for up to 30 years.

The animal that can survive the longest without oxygen is the tardigrade. Tardigrades are tiny, water-dwelling animals that can withstand extreme conditions, including extreme cold, heat, and radiation. They can also survive for extended periods of time without oxygen, up to 10 years in some cases.

Tardigrades are able to survive without oxygen by entering a state of cryptobiosis, in which their metabolism slows down and their cells enter a state of dormancy. This allows them to survive in environments where other animals would quickly die.

Tardigrades are found all over the world, in both fresh and salt water. They are an important part of the food chain, and they play a role in the decomposition of organic matter.