Yet Another Mystery Crab

captbunzo

Premium Member
Hey, folks.... This hobby never ceases to amaze me as to the stuff you can find in your tank after months. I have discovered a small "mystery crab" in my tank recently. This sucker is probably about 1-1.5 inches across, including legs. I found it in my tank today and snapped some pics. Lovely little hitchhiker. Anyhow, I am curious if anyone knows what this is. Now, I know that crabs can be hard to identify. But anyhow.

Larger pics can be seen by going to those on flickr, here:
http://flickr.com/photos/captbunzo/165111394/in/set-72057594143172842/

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sadsak

New member
My guess is a decorator crab or something really close to that! Rarely will you ever get a good hitchhiker.
 

chris4693

New member
Cool looking crab!

From the looks of its claws they seem to be rounded, like an emerald crab, which would be good cause it could be a scavenger of vegi's.

Sharp pointed claws like a gorilla crab would most likely be a meat eater, eating snails, other crabs and fish it could catch.

Just my guess, I could be wrong, someone please correct me if I am.
 

djc1026

New member
Paul, if I were to guess, I would say some species of gorilla crab.

Chris, the claws look pointed to me, not with the little ice cream scoops on the ends like mithrax.

Well, there you go, no better off than before :) Three replies, three answers :)

Dave
 

dummyterminal

New member
pic of a crab i found on google labled as a gorilla... they look awefuly close

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could it be the same paul whitby we all know???
 

captbunzo

Premium Member
For what's it's worth, Dr. Ron Shimek over in his Marine Depot forum claimed this appeared to be a grapsid crab. He also commented, interestingly enough, that to do a better identification he needed a better (top down) picture of the carapace. One benefit of it being a grapsid is that, he said, they stay fairly small. Of course, that's a pretty relative term... :)

The he posted a link to this article on basic crap biology and identification.

And, btw, a grapsid is not a gorilla crab. Gorillas are xanthids. Not that any of this means anything. This is just, as djc1026 said, a fourth answer that may or not be correct. :)

At least the article was interesting... :)
 

kpk

Been Reefin'
True Whitby. Come to think of it down in the gulf I have caught crabs that look like that and the one I had. They just call them rock crabs. I brought one back one time and it was bad news for a damsel he was with lol...

Kyle
 

Travis L. Stevens

New member
<a href=showthread.php?s=&postid=7545237#post7545237 target=_blank>Originally posted</a> by tgwinn
Being new to all this, I am just really curious as to what "crap biology" is....LOL:D

I'm not sure, but I think punctuation was lacking in that statement you quoted. (and maybe a little misspelled words)

"Then" he posted a link to this article on "basic crap, biology, and identification"
 

Travis L. Stevens

New member
<a href=showthread.php?s=&postid=7545438#post7545438 target=_blank>Originally posted</a> by tgwinn
Ok...sorry..i was only kidding :) Excuse my goofy sense of humor.

I missed the sarcasm, sorry. It took me a couple times reading that sentence to figure it out, though. ;) Maybe it is I that is the goofy one
 

tgwinn

New member
It's ok..maybe wasn't as funny as I thought.. anyway, I won't try to pull it off again in a purely textual format where the sarcasm can be easily missed. Ok, back to topic...so sorry for the hijack of thread.
 

captbunzo

Premium Member
I caught the sarcasm - and I always appreciate a good hijacking of a thread...

And just for the record, that was an article on CRAB biology.
 

tgwinn

New member
I knew it was on crab biology. :) I just did a very bad job of getting the quote right with the little "quote" button. My bad, and certainly nothing personal meant. Anyway, that is a very cool thing to suddenly "discover" something in the tank that wasn't put there...lol Oh, I bought the octo from luvabunny this weekend and got him or her put back in the tank with some angry red color flashes..lol This tank with the octo is my first foray into anything salt so hopefully all will go well.
 

tgwinn

New member
yeah, we did the same thing that she did...duct taped the edges of the glass all around the back of the tank to keep him in there. Also, used the rock on the glass lid for a weight to help in that area too. I just went home and mimicked the exact setup she had so he wouldn't be as stressed from the move. I did notice after getting everything set up last night that all the parameters were good except the nitrates were pretty high. I might have to do a bunch of small water changes to bring that back into the normal range. Or is there a better way with saltwater that I don't know about?
 

captbunzo

Premium Member
This will sound like strange advice... But I would adjust the nitrates down slowly over a number of water changes - say over a week. Also, you might add a skimmer to the tank. I do not believe she had one on it. Octos are very messy eaters, from what I have read. A Coralife Super Skimmer 65 can be got for $80 or so and would do the trick nicely.
 
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