Florida live rock hitchhiker ID.

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I just received a shipment of Florida live rock. I found a few strange worms. They are quarantined for now. The large blackish one actually lights up under LEDs. It’s also quite large, maybe around 2-3 inches. Any ideas?

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Black guy is a Eunice worm. How did you manage to get it out? They are usually in very tight in the rocks? Di ld it break apart? They can grow new heads.

There is an isopod in there, but can't tell if cirolanid (very very bad) or spheromatid (actually pretty good) without seeing its eyes. You can also fish it out and put it on a paper towel and see if it curls up like a roly poly--if so, most likely spheromatid.

Peanut worm on bottom right. Middle pink giy, not sure in the pic.
 

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black bobbit and peanut worm
My understanding is Eunice != Bobbit. Loads of Eunice species and most seem to be detritivores and opportunistic predators, not the nightmarish ambush predators from the Indo-Pacific. Still, they can get huge, and huge opportunistic predators in a small tank (any tank) can become a problem.

NOT a keeper.
 
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Black guy is a Eunice worm. How did you manage to get it out? They are usually in very tight in the rocks? Di ld it break apart? They can grow new heads.

There is an isopod in there, but can't tell if cirolanid (very very bad) or spheromatid (actually pretty good) without seeing its eyes. You can also fish it out and put it on a paper towel and see if it curls up like a roly poly--if so, most likely spheromatid.

Peanut worm on bottom right. Middle pink giy, not sure in the pic.
The pod is a bad isopod, he got trashed. The large worm was just hanging out in the bottom of the bag the rock came in. Thanks for the info! That’s kind of what I was thinking they may all have been.
 

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The pod is a bad isopod, he got trashed. The large worm was just hanging out in the bottom of the bag the rock came in. Thanks for the info! That’s kind of what I was thinking they may all have been.

Keep an eye out for more of the eunice worms. I use a red flashlight at night to see the monsters come out. Not sure how you'd get them out anyways though without breaking the rock apart. You can also check your fish at night for isopods stuck to them or use the stinky water trap method. Or...
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Yeah, the black Eunicid worm there (the non-bobbit) would be a great sump monster (provided it couldn't get back into the DT from the sump). If you don't want it, I'd seriously check around to see if anyone does - these specific Eunicids are rare and pretty, but I can't find any info on what the scientific name might be.

Here are the other threads I've been able to find with these:
 
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This rock will be going into a mantis shrimp tank that isn’t fully built. I may end up putting some small fast fish in though! Those isopods will starve with no fish to host on after a week or so?
 

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This rock will be going into a mantis shrimp tank that isn’t fully built. I may end up putting some small fast fish in though! Those isopods will starve with no fish to host on after a week or so?
anecodtal reports of them being quite resilient in absence of fish. Most success I've read about were people catching them at night with turkey basters until the population dwindled--I was initially super worried until I found out mine were spheromatids.
 
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anecodtal reports of them being quite resilient in absence of fish. Most success I've read about were people catching them at night with turkey basters until the population dwindled--I was initially super worried until I found out mine were spheromatids.
I’m guessing where there was one, there’s bound to be more. Before I put anything in the tank I’ll have to set some traps and see what crazy stuff I can catch. I did find a dead tiny mantis in the bottom of the bag. I wished he had lived.
 
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Yeah, the black Eunicid worm there (the non-bobbit) would be a great sump monster (provided it couldn't get back into the DT from the sump). If you don't want it, I'd seriously check around to see if anyone does - these specific Eunicids are rare and pretty, but I can't find any info on what the scientific name might be.

Here are the other threads I've been able to find with these:
The worm I have looks almost identical as those guys. Mine is actually kind of pretty under LEDS. I just moved his cup under one for a second.
 

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The worm I have looks almost identical as those guys. Mine is actually kind of pretty under LEDS. I just moved his cup under one for a second.
I have no doubt someone would take that Eunice from you and probably pay for shipping, the non bobbit types are hard to find and even harder completely intact like that one is.
 
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I have no doubt someone would take that Eunice from you and probably pay for shipping, the non bobbit types are hard to find and even harder completely intact like that one is.
I’m holding on to it for now. If anyone wants it, I’ll gladly send it on its merry way!
 

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I had the exact same white banded Eunice worm from my KP Aquatics and he took a liking to eating acroporas. We easy to find him as there was a pile of empty snail shells under his lair. I would recommend not leaving him in your tank.
 

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Yeah that big guy is definetly an eunice worm (bobbit worm) they are scavengers but could also be predatory, i got 2 brown redish in my 13.5g tank, heres what 1 of mine looks like
20221228_093248.jpg
 
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The worm is gone. I won’t be able to get a picture, but it’s legs or feelers or whatever those things are along both sides lit up a cool purple color under my Kessils.
 

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