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Old 03-02-2007, 01:04 AM   #11
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Taht is a Mithrix crab, but a mithrix is a family, not a specific species (emerald crabs are mithrix crabs as well, along with species known as anenome crabs or banded clinging crab) There are around 100 species in the mithrix family that I have seen named, I had to do a ton of research to find the type of mithrix hitchiker I have in my tank.

Not all are good, they for the most part stay small, most will simply eat algae or scavenge, but some are predatory, and some will out-host a clown fish on anenomes, and will kill any clown that tries to host that anenome if it can, or at least chase it away, and the anenome seems to prefer the crabs

BTW, almost all mithrix crabs have hair on their legs and/or back, tehy are chracterized by the shorter but muscular looking legs and claws, the very wide and thick, slightly bulbous body
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Old 03-02-2007, 09:20 AM   #12
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Cool, thanks for the new info, Jarred.
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Old 03-02-2007, 10:11 AM   #13
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Wow...good information Jarred!!! Thanks
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Old 03-02-2007, 04:26 PM   #14
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Yeah, that's great info. I'll try to do some more research and correctly ID him. In the meantime I've kept the glass in there to try and trap him to no avail. He's pretty shy still so I don't know how much he ventures around his rock but I'll keep trying.
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Old 03-02-2007, 04:46 PM   #15
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Quote:
Originally Posted by Jarred Darque
Taht is a Mithrix crab, but a mithrix is a family, not a specific species (emerald crabs are mithrix crabs as well, along with species known as anenome crabs or banded clinging crab) There are around 100 species in the mithrix family that I have seen named, I had to do a ton of research to find the type of mithrix hitchiker I have in my tank.

Not all are good, they for the most part stay small, most will simply eat algae or scavenge, but some are predatory, and some will out-host a clown fish on anenomes, and will kill any clown that tries to host that anenome if it can, or at least chase it away, and the anenome seems to prefer the crabs

BTW, almost all mithrix crabs have hair on their legs and/or back, tehy are chracterized by the shorter but muscular looking legs and claws, the very wide and thick, slightly bulbous body

Nice info Jarred, kudos to you. Could you please post your research/references? I'd be very interested in reading more of it. Thanks.
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Old 03-02-2007, 10:21 PM   #16
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I would too!
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Old 03-03-2007, 02:42 PM   #17
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Sure, I will try to find it all again, I didnt bookmark it or anything, I will start looking once I get to school, maybe I can try and find some actualy published info on the college library network.

Here is the first bit though to help out some.

Green Emerald Crap --Mithrax sculptus is the scientific name, Mithrax is the genus, or whatever, sculptus is the specific species, as we all know with all of the variations of fish that we keep. OH, and I was wrong on the family, t he family is Majidae, which includes even more crabs (teh family in english means Spider Crabs, which includes some 30+ genuses, mithrax being one, which on the list posted below has at least 16 variations on it)


http://animaldiversity.ummz.umich.ed...=21&Search.y=6

and here is a link of 16 differant mithrax crabs, including the green emerald, BTW Mithrax seems to translate basically to clinging crab, I guess related to their stocky build and muscular claws
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Old 03-05-2007, 03:10 PM   #18
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If it is an emerald mithrax crab its good because it will eat bubble algae if you get
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Old 03-05-2007, 04:16 PM   #19
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So I'm pretty sure he's not an emerald mithrax crab since I have one in there and they don't look similar unless emerald crabs start out as black/grey when they're young. But there's a possibility he could a part of the mithrax family (I hope). He hasn't ventured into the glass yet so I think he's still pretty shy. I may just let him hang out in there unless I notice some damage being done to my coral.
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