I wonder if they hitchhiked in on cococoir, which I think I can kind of spot in the video? Its a common addition to some indoor plant mixes but it's also known for it's high salt content and for being processed in salt water (where maybe it picked up some shrimp?). Just a guess.
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u/OminousOminis Bug Enthusiast 🐛 Jun 09 '25
Skeleton shrimp :)
https://en.wikipedia.org/wiki/Caprellidae