Pom pom crab - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 11 Old 04-11-2009, 08:01 PM Thread Starter
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Pom pom crab

Hi all,

I've got a pom pom crab in my 90 gallon tank. I've had him in there for a couple of months... I was worried initially that I'd never see him, they're usually recommended for small nano tanks, simply because they like to hide and hang out in the rocks (I've got 150 lbs of LR, thinking I'd be lucky to get one glimpse a month if that). He's actually been fairly "out there", he does stay in the rocks, but will make an appearance at the edge of the rockwork a few times a week.

Early on, he lost one of his two front arms which hold the anemones, so he only had one anemone. I was worried that even after he re-grew his arm after a molt or two, that he'd be without the other anemone... well he molted, and just yesterday we noticed that he has two anemones again! I don't know if he split the one he was carrying, or if he remembered where he left the other, and picked it back up again, but however he did it he's got both of his pom poms back now lol.

Before (missing arm) and after (today) shots:

100_0736.jpg

000_0017.jpg

"To an optimist, the glass is half-full;
to a pessimist, the glass is half-empty;
to an engineer, the glass is twice as big as it needs to be"
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post #2 of 11 Old 04-11-2009, 08:29 PM
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Cool Crab!
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post #3 of 11 Old 04-12-2009, 03:35 AM
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wow!! that's amazing.
i didn't know they could grow them back,and it looks so normal,
some things get limbs back,but they look deformed.

when you set up a new tank,hide an extra
sponge or two behind some decor,that way you have
something seeded for you next filter.
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post #4 of 11 Old 04-12-2009, 09:42 AM
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I would have never thought they could regenerate a missing limb. How did he lose his limb to begin with?? Thanks for posting these pics!

If you don't stand up for something you'll fall for anything...
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post #5 of 11 Old 04-12-2009, 11:19 AM Thread Starter
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yeah crabs can definitely regenerate missing limbs when they molt, though it might take a couple of molts for it to return to its normal size. I think my crab's newly-regenerated arm is a little smaller than the other, so it might take another molt for it to be back full-force. I'm really stoked that it got the other anemone back though.

As to why he lost it to begin with, I'm thinking one of the other larger tank-mates had it out with him early on... there's a coral banded shrimp in the tank that's the likely culprit, or maybe one of my more aggressive fish (4-stripe damsel, maroon clown). This pom pom crab is really tiny, like less than an inch across, so without those stinging anemones, he's pretty much a mobile lunch for whoever wants him :P

"To an optimist, the glass is half-full;
to a pessimist, the glass is half-empty;
to an engineer, the glass is twice as big as it needs to be"
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post #6 of 11 Old 04-12-2009, 01:59 PM
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aww bless him,so it could happen agine then ?

when you set up a new tank,hide an extra
sponge or two behind some decor,that way you have
something seeded for you next filter.
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post #7 of 11 Old 04-12-2009, 09:56 PM
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these crabs are cool.. even without the anemones they will "box" with opponents when threatened.

nice shots too, i like the pattern on its shell.
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post #8 of 11 Old 04-20-2009, 07:22 PM
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Respect to him!!! Awesome Pics!
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post #9 of 11 Old 05-23-2009, 12:07 AM Thread Starter
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I got a nice, clear photo of him today, he and his 'nems are still kicking! The pattern on his eyes makes it look like he is constantly squinting LOL, like he's angry or very suspicious of everything :D

pompom.jpg

"To an optimist, the glass is half-full;
to a pessimist, the glass is half-empty;
to an engineer, the glass is twice as big as it needs to be"
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post #10 of 11 Old 05-23-2009, 12:20 AM
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very nice pic bro!
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