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Who Has the Most Genes?

Published in Genetics 1 min read

The animal with the most genes is the Daphnia pulex, also known as the water flea.

The Surprising Gene Champion

It might be surprising to learn that a microscopic crustacean holds this title, but the Daphnia pulex boasts approximately 31,000 genes. This is significantly more than humans, who have around 23,000 genes. This was revealed in a study done on the Daphnia pulex, with results published on February 3rd, 2011, revealing this amazing fact.

How Does Daphnia Compare to Humans?

Species Approximate Number of Genes
Daphnia pulex 31,000
Humans 23,000


The fact that a tiny creature like the water flea has more genes than a complex organism like a human highlights the incredible diversity and complexity of the natural world.

Why Does Daphnia Have So Many Genes?

  • The complex genetic makeup of Daphnia pulex allows it to quickly adapt to changes in its environment.
  • The water flea's genome plays a crucial role in its survival and adaptability to its freshwater habitat.

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