However, while they dont have respiratory organs, tardigrades do require oxygen to live.

But what if there is an animal that doesnt need oxygen, one of the essentials to life?

Instead, the H. salminicola sustains itself by directly taking nutrients and molecules from its salmon host.

cnidarian Henneguya salminicola parasite without a mitochondrial genome

Photo:Stephen Atkinson(CC BY 4.0)

In most organisms, mitochondria are responsible for converting food into energy.

The study’s results showed the presence of mitochondrial DNA in M. squamalis, but not in H. salminicola.

Its finding brings up the question of life in extreme environments, including those found in space.

Henneguya salminicola parasite without a mitochondrial genome

Photo:Stephen Atkinson(CC BY 4.0)

As research on extraordinary organisms continues, our understanding of the fundamentals of life will continue to evolve.

Henneguya salminicola parasite without a mitochondrial genome

Photo:Stephen Atkinson(CC BY 4.0)

Henneguya salminicola parasite without a mitochondrial genome

Photo:Stephen Atkinson(CC BY 4.0)