Kp live rock. 10 lbs in water arrived today!

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t5Nitro

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Here's the crab. I put him back in the tub for now. Good guy still?
 

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Yep, red mithrax. Usually chill, but still opportunists, and just large enough to have a shot at being troublesome as adults.
 
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Any ID for this thing? Keeps growing in size.
 

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Tired

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Looks like a small collection of tunicates. If you poke it with something, does it shrink up? If so, likely tunicates. Harmless, neat filter-feeders. Our closest non-vertebrate relatives.
 
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t5Nitro

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I have 3 of the pieces in the tank now. I saw this guy this morning and removed it. Did my tank grow this big bristle worm or is this from the kp rock? Any ID? I've got a lot of bristleworms, but they're small and nothing close to this one.
 

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Tired

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Bit tricky to see species when it's out of water. It's also good to put suspect critters in water in case they're harmless, so you can put 'em back alive.

Doesn't quite look like the normal bristleworms to me.
 

NoahLikesFish

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I just threw 15lbs straight into my tank. Removed a fire worm, caught him eating a shroom. All good.
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i like that tank, it combines the modern techniques of blue light and some designer coral with the old techniques like live rock and it looks like a nice simulation of a deepwater biotope with the angel
 

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I know it sounds crazy but I preferred when they delivered the rock wrapped in wet newspaper. Most of the unwanted critters were in the bottom of the box, while lots of the good stuff survived. That big bristle worm is common in KP rock. There are many pencil-sized one's in my tank. While a little creepy when they emerge at feeding time, I've never seen them bother anything.
 
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Got another ID. This guy was at the top of the tub. Small.
 

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Tired

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Interesting. Look up "bristleworm epitoke" and see if it seems about right. Some species of worm detach their back ends to breed, and said ends swim off and spawn in midwater away from the worm. That's an epitoke.
 

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Interesting. Look up "bristleworm epitoke" and see if it seems about right. Some species of worm detach their back ends to breed, and said ends swim off and spawn in midwater away from the worm. That's an epitoke.
Nature is freakin crazy...
 

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If you think about it, it does make some sense. That trick allows the worm to spawn in midwater, without exposing the rest of its body to predators. But it's also an animal detaching a portion of itself to go and reproduce. It's pretty wild.
 

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I thought that was an urchin! Wasn't entirely sure.
They can eat coral so be careful :)
Sounds good guys.

I can give it some hypersonic dunks and inspect it the best I can and put it in the tank. I can always go chasing the critters later if its a problem. I've never ordered the stuff before. 10 lbs is in 4 rock pieces. 2 of those rocks are pretty dang small. I could see definitely something living in those 2 on the left though if any were housing nasty creatures.

I tossed in some NLS pellets. I can throw a light on it tonight and take it out and inspect them later tonight. There is this one thing I found but I'm not sure what it is. Was jist out in the open. Looked again and it's gone. Not sure what its move looked like.

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I know this is an older thread but I heard about putting some generic club water over the rocks to help remove crabs and critters that won’t be affected by hypertonic solutions :) I’m gonna try it with my rock
 
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