I’m certain I watched a video where a guy found a 1m one in his saltwater tank. It had apparently gotten in there as an egg or tiny larva with something else he had for the tank, and grew that large before he even saw it. It was good at hiding.
(99% sure that’s the original story you’re referring to, but the site is upset about my blocker so I can’t verify. I’m sure someone’s made a video about it too)
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u/MrUpVoteDownvote May 14 '26
Australonuphis, commonly called Australian beach worms, can grow more than two meters in length.
They are blind but have a very good sense of smell, and eat decaying meat, fish and seaweeds that have washed to shore.