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Old 06-09-2005, 08:52 PM   #1
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Remove Hitchhicker Urchins??? Pics

I received 4 hitchhicker Urchins with my LR, I noticed that the Coraline Alage on the rocks they mainly stay on, which also gets the best light is getting severely depleted. Do you think i should remove them, all of them or some of them? If remove, how would i do that. Also, i heard that when Urchins die, they release a poison that will kill everything in the tank, is this true. Here is a link to a pic.

http://im1.shutterfly.com/procserv/4...108AaOGjdi4Ztq

Thanks,

- Jeff
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50 Gallon Oceanic: 2 maxijet 1200's, 2 150 watt visitherm heaters, BakPak II Skimmer with PS & BT, Coralife Lunar 2X65 watt Power Compacts

Filtration: 50lbs LR.com, 60lbs sand

Swimmers: 2 O. Clowns, Yellow Watchman, Firefish, Yellow Tang, Dottyback.

Clean-Up: Several snail & hermits, Skunk Cleaner, 2 Peps.

Corals: 2 zoo colonies, yellow polyps, star polyps
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Old 06-09-2005, 08:58 PM   #2
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I removed all of mine. I got about 10 of them. I kept a few in my sump and they have done fine in there.
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Old 06-09-2005, 09:15 PM   #3
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Re: Remove Hitchhicker Urchins??? Pics

Quote:
Originally Posted by badfish
I received 4 hitchhicker Urchins with my LR, I noticed that the Coraline Alage on the rocks they mainly stay on, which also gets the best light is getting severely depleted. Do you think i should remove them, all of them or some of them? If remove, how would i do that.
As long as you have no coral in the tank they are of little concern. Small immature urchins will feed on just about anything they can chew. As they mature their tastes will be primarily for algaes. With this guy though it is a rock boring species and loves coralline. The larger it gets, the more it will strip the rock so they will need to go in a year or so.

The easiest way to remove them unharmed is to wait until lights out when they're most active and quickly nudge them from the side with a plastic spoon or similar. Do not try prying them off or lifting them. They have an amazingly strong grip. They are easily knocked to the side and should not be damaged. Put them in a fuge or sump unless your LFS will take them. They most likely won't give you much if anything but IMO, worth the effort. Use a plastic food grade container to return/transport them.


Quote:
Also, i heard that when Urchins die, they release a poison that will kill everything in the tank, is this true. Here is a link to a pic.
As with anything it greatly depends on tank size and animal maturity but in general this is not true. They can definately foul the water quality if left to "the forces of nature".

Cheers
Steve
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Old 06-09-2005, 09:22 PM   #4
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thanks guys, when i add coral in a couple of months, ill be sure to remove them all.
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50 Gallon Oceanic: 2 maxijet 1200's, 2 150 watt visitherm heaters, BakPak II Skimmer with PS & BT, Coralife Lunar 2X65 watt Power Compacts

Filtration: 50lbs LR.com, 60lbs sand

Swimmers: 2 O. Clowns, Yellow Watchman, Firefish, Yellow Tang, Dottyback.

Clean-Up: Several snail & hermits, Skunk Cleaner, 2 Peps.

Corals: 2 zoo colonies, yellow polyps, star polyps
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Old 06-11-2005, 12:13 PM   #5
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Re: Remove Hitchhicker Urchins??? Pics

what would they eat in the sump? only thing living in there are pods..
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Old 06-11-2005, 05:32 PM   #6
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i personally dont have a sump but most people keep LR in there sump, they would probably feed off the LR.
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50 Gallon Oceanic: 2 maxijet 1200's, 2 150 watt visitherm heaters, BakPak II Skimmer with PS & BT, Coralife Lunar 2X65 watt Power Compacts

Filtration: 50lbs LR.com, 60lbs sand

Swimmers: 2 O. Clowns, Yellow Watchman, Firefish, Yellow Tang, Dottyback.

Clean-Up: Several snail & hermits, Skunk Cleaner, 2 Peps.

Corals: 2 zoo colonies, yellow polyps, star polyps
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Old 06-11-2005, 11:27 PM   #7
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I got 13 of these on my first live rock. I kept them to adult size then sold them to lfs for 3bucks each. (better than what I expected) They were never a problem. They did eat some coralline but even in such numbers, not enough to really concern me. I did eventually get rid of all but one just because I was worried there wouldn't be enough food for them all and they are clumsy. That's the biggest issue I have with the one I have left. If a coral isn't glued down well, it's usually on the bottom of the tank by morning.
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Old 06-11-2005, 11:34 PM   #8
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you can mail them to me, I love urchins!!
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Old 06-12-2005, 10:57 PM   #9
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If one of these little *beep* would eat the coarline off the side of my sump so I could see in it I would buy two!
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Old 06-13-2005, 04:48 PM   #10
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I bought two urchins to help with a massive hair algae problem. I scrubbed the rocks clean, and added the two urchins and my tank has been very clean since then (about a month). However, my LR is slowly losing the coraline. It's ok by me, I prefer plain looking LR over a hair algae farm anyday.
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