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Generally, fast moving organisms are not parasites. Some can be micro predators, but the worm parasites I know of are slow. I don’t know what this is though - seems to have a segmented body though, so not a fluke. I don’t see a sucker at both ends, so not a leech.
Interesting! I have a pretty good number of CUC members in my tank, but haven't seen any deaths - thankfully. I've taken it out since I'm worried it'll eat my corals/fishBelieve there is one family of Leech that has secondarily lost the suckers and parasitic lifestyle. If I remember right they are predators of snails or bivalves.
So might not be good but maybe not all that bad either—unless it’s eating all your snails or clams.
Thank you! I've never seen anything quite like it and it hadn't come up on any hitchhiker ID guides I've used. I've discarded it as a precautionIt is a species of ragworm or clam worm.
We see them at certain times of the year in massive swarms along our coast. The do not sting, but can bite.
Thank you! This is really reassuring.Generally, fast moving organisms are not parasites. Some can be micro predators, but the worm parasites I know of are slow. I don’t know what this is though - seems to have a segmented body though, so not a fluke. I don’t see a sucker at both ends, so not a leech.
Kay
I didn't really get a good look at the mouthpart, but it didn't seem to have any pinchers/fangsLooks like some kind of oligochaete, or hirudinid (leech). What did the mouthparts look like? being a fast swimmer I'd suspect some kind of ectoparasite.
Not sure if something like prazipro would work for this type of worm. These treatments are meant for round/flatworms, not segmented worms.