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Posted in Earthworms Segmented Worms Annelida Worms Generally

Hundreds of Earthworms Discovered in Pool After Rain

“I find hundreds of earthworms in my pool after it has rained”, writes this reader in their submission, which does not include any pictures or videos. “It looks like a mass suicide? Now, I read they can survive for up to two weeks under water. Is the chlorine in the pool toxic for them, and how can I help them get back into the ground?” To start with, whether or not earthworms can survive underwater for two weeks seems to be a debatable topic. Some sources say they can survive for weeks underwater, while others say they can survive for hours. Our take is that this would be entirely dependent on the species. There are species of earthworms that belong to a group of worms called ‘bloodworms’. They are typically red in color, which they get from the excess production of hemoglobin, which does indeed allow them to survive in low oxygen conditions, such as underwater, for long periods of time. That said, not all species of earthworms are bloodworms, and we doubt the earthworms our reader found are bloodworms.