This tiny, near-microscopic water flea has more genes than you. In fact, this freshwater zooplankton is the first crustacean to have its genome sequenced, and its 31,000 genes crowns it the animal with the most genes so far. For those keeping count at home, the average human has about 20,000 to 25,000 genes.
The translucent water flea is a Daphnia pulex, and lives in ponds and lakes throughout North America, Europe and Australia. It can also reproduce without sex, is the most commonly found species of water flea and is a “model organism”, meaning it’s studied extensively and provides insight into other, rarer species.
The reason for this little critters’ super-high gene count comes down to its rapid rate of gene multiplication. “We estimate a rate that is three times greater than those of other invertebrates and 30 percent greater than that of humans,” project leader and CGB genomics director John Colbourne said in a press release.