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Old 03/20/2017, 12:45 PM   #1
majorjoey
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can you Id a crab from just his shed?

I have a hitchhiker crab that I wish to Id
was wondering what type he was
can you ID a crab via his shedding armour>?



thanks

Joey


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Old 03/20/2017, 12:50 PM   #2
majorjoey
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pretty sure this is same crab not sure why when he was younger (in his skin?)
his jaws are red but anyways offer to help ID

thanks

Joey


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Old 03/20/2017, 12:59 PM   #3
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I think it might be a Stone crab. These will sometimes hitchhike their way into our tanks via live rock.

http://www.advancedaquarist.com/2010/12/inverts


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Old 03/20/2017, 09:36 PM   #4
sam.basye
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Looks like a mithrax.
The pointed claws indicate that it eats meaty foods. Supplementing with little bits of shrimp, etc. or shrimp pellets will keep it happy. They are opportunistic feeders, but won't catch a healthy fish.
Max size about 2.5-3".
They can be a very entertaining creatures.
There is an algae eating variant which has claws with flat, cymbal-like, tips for grazing algae.


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Old 03/21/2017, 01:23 PM   #5
majorjoey
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thanks for the replies


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Old 03/22/2017, 05:53 AM   #6
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Mithrax don't have black tips on their claws, at least not the ones I see. IMHO this is probably a stone crab, a carnivore which will grow way too big or die in an aquarium.


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Old 03/23/2017, 02:28 PM   #7
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You sure, Ron?

About 2 years ago I collected this one from the keys. I was always under the impression that it was a mithrax.
If I remember correctly, it was living with some larger red emeralds and some larger white ones.





Stone crabs are usually more oval-shaped and have a glossy shell.


Maybe it's a hybrid stonethrax crab? Lol


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Old 03/23/2017, 02:49 PM   #8
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This link might help.

http://reefkeeping.com/issues/2003-12/rs/index.php


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Old 03/23/2017, 03:35 PM   #9
Ron Reefman
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Quote:
Originally Posted by sam.basye View Post
You sure, Ron?

About 2 years ago I collected this one from the keys. I was always under the impression that it was a mithrax.
If I remember correctly, it was living with some larger red emeralds and some larger white ones.

Stone crabs are usually more oval-shaped and have a glossy shell.

Maybe it's a hybrid stonethrax crab? Lol
Stonethrax... I like it.

No, I'm not sure, but then the Mithrax crabs I've collected are always either very green or very ruby. So no, I'm not sure.


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Old 03/24/2017, 05:23 AM   #10
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What you both have there are baby trouble makers. As soon as they are big enough to grab something they will.


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Old 03/26/2017, 06:59 PM   #11
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Nice link more crab Intel then I could uptake !
I will catch mine soon
as I spot him again


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Old 03/31/2017, 03:34 PM   #12
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that crab looks like a trouble maker. Mithrax are usually reef safe when small but even they can get rambunctious and cause issues. I have always heard black tip claws need to get them out of your tank.


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