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Old 01-25-2012, 07:35 PM   #1
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EmerAld crab ate my duncan

One of my deals crabs ate a head of my Duncan today. This seems odd. There is plenty of green hair algae in the tank for them to eat. What's the deal? How can I prevent this in the future?
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Old 01-25-2012, 08:18 PM   #2
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Define ate. I have a hard time believing an emerald ate a duncan. Maybe something that was marketed as one and wasnt? Got a pic?
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Old 01-25-2012, 08:42 PM   #3
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I had an emerald crab for one night. He was in my tank for less than 2 hours before I caught him eating my zoas. He finished off at least 3 polyps before I shooed him away, figuring it was an isolated incident and he just hadn't found the algae yet. An hour later, he was eating my torch. And I totally mean eating. Finished off several tentacles before I caught him and returned him to the LFS.
While Emeralds will eat the stuff we don't want, crabs are opportunistic feeders. If they find yummy corals and aren't currently stuffed full, they will eat those yummy corals.
It's too bad. I think they're pretty cool looking. I won't risk another one, though.
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Old 01-25-2012, 08:49 PM   #4
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I know my saltwater critters it's a emerald clearly...kinda hard to mistake an emerald crab if you have half a brain. I have seen him eating zoos in the past one time and then he never touched them again. He ate all the flesh out of the skeleton on the Duncan I have one of the heads that is completely cleaned out and I saw him doing it when I came home. Very upsetting. So I moved it up onto my rocks and am hoping it doesn't happen again other wise I'll be fishing for crabs soon haha.
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Old 01-25-2012, 09:00 PM   #5
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I think Sniper was thinking perhaps the Duncan was mislabeled? A lot of corals look very similar, and not every LFS has staff who know when something is mislabeled.
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Old 01-25-2012, 10:39 PM   #6
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thats not an uncommon thing. if they aren't well fed crabs can eat corals. if you see this and you have a refugium you can always throw the crab in there to help keep thinks pruned or you can give it to soemone with a FOWLR that doesn't have to worry about corals
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Old 01-26-2012, 12:44 AM   #7
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my fuge is a hob aqua clear 70 that has a blocked area would it be ok in there?
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Old 01-26-2012, 02:26 AM   #8
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i wouldn;t keep it in to small of an area, it might get stressed out
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Old 01-26-2012, 04:55 AM   #9
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I have some bubble algae, which is why I got my emerald. Sadly, it looks like I'm going to have to deal with the bubbles on my own. The crab is just too risky for me. Maybe if I have a larger tank in the future, I'll give it a try again, but for now...
And Gti is right. Not enough room in an aqua clear. How many Emeralds do you have? They might be competing too much for food if you have more than one in a 25g tank.
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Old 01-26-2012, 10:41 AM   #10
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I have 2 but there is tons of food for them I can see it. The other one is always grazing on algae and this one seems to like other things more.
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