My emerald crab!! - Aquarium Forum
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post #1 of 13 (permalink) Old 11-22-2014, 07:40 AM Thread Starter
 
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My emerald crab!!

Hi guys

The good news is my tank is now up and established and all the levels are optimal, So I introduced a couple of fish, I have the usual 2 clowns which are doing awesome, I already had a cleaner and a camel shrimp in there and they get on well with everyone.

Then the big diatom bloom hit again so 4 turbo snails, 2 red legged hermits 2 blue hermits and an Emerald crab over night wiped the tank of the bloom, I then introduced a chalk goby to sift the sand.

So Fast forward 3 weeks and I am down 2 snails as they have fallen onto there backs and had being munched before I could save them.

Then the next big murder the cleaner shrimp, my main suspect is the emerald have to keep an eye on him, left the tank alone for 24 hours and BOOM the goby is now missing :( . Has anyone else experienced this.
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post #2 of 13 (permalink) Old 11-22-2014, 08:05 AM
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Re: My emerald crab!!

Shame to hear of the mass murderer. I myself have no experience with any of these species so can offer no help.

"I've macrostoma tastes on a veiltail budget. "

If i drew it it'd look like a monkey eating a horsradish on the moon or something
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post #3 of 13 (permalink) Old 11-22-2014, 08:19 AM
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Re: My emerald crab!!

Really need actuall water numbers(all).
If you have live rock you may have introduced a pest(mantis shrimp) that is causing the trouble?
Once a snail dies your water can/will foul pretty quickly(ask me how I know?).
With poor water anything can die and as for your clean up crew? Sounds like they're on the night shift?They'll polish off an individual death quickly possibly leaving nothing behind.



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post #4 of 13 (permalink) Old 11-22-2014, 09:46 AM Thread Starter
 
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Thanks for the quick replies, I have checked the snail shells they where empty so I have left left the shells in for the hermits to migrate, water levels are still good. Only things in my tank that are in the live rock are a few frilly looking tube worm things I think they are called
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post #5 of 13 (permalink) Old 11-22-2014, 05:03 PM
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Re: My emerald crab!!

Maybe they are just establishing territory in a very unfortunate way. Perhaps adding more hiding places would help break up.lines of site and provide escape.

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post #6 of 13 (permalink) Old 11-22-2014, 05:35 PM
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Re: My emerald crab!!

it is most likely the crab.i do not have a sw tank but i did my research for a few months before i wimped out and made my 29 high into fw.

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if it's dry let it die,if it's wet make it a pet!!
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post #7 of 13 (permalink) Old 11-22-2014, 07:19 PM Thread Starter
 
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There are lots and lots of hiding places, there's a good 25kg of live Rock piled up in a way to make caves ledges and such with 360 degrees of space to go round it. Seems to of calmed down a bit. If I can catch him I will take him back to the shop, he is awesome but the fish ain't cheap. It cannot be because he is hungry as a feed him daily on different foods
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post #8 of 13 (permalink) Old 11-22-2014, 08:27 PM
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Re: My emerald crab!!

Welp no one added this one so I'll throw down. Are you sure its a diatom bloom? Dinos will kill your inverts off.

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post #9 of 13 (permalink) Old 11-23-2014, 04:51 AM Thread Starter
 
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Yeah pretty sure , I googled it just to be sure. The cleaner shrimps head was half hanging of I think he may of been to trying to molt and got ambushed
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post #10 of 13 (permalink) Old 11-23-2014, 06:50 AM
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Re: My emerald crab!!

I'm almost certain the hermits can/will kill snails for their shells if they are big enough.
The fish? Possibly if trapped by the hermit.
Just because the shell is empty does not mean the snail died naturally?The hermits/shrimp will eat it eitherway.
I'll never put a hermit in any tank unless it is for them,they are just pest!
And you won't see a mantis shrimp unless you know how to look for it or you hear it make snapping noises.They are most active at night and very good at hiding.



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post #11 of 13 (permalink) Old 11-23-2014, 09:23 AM Thread Starter
 
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Have never heard a snapping, will keep an ear out for it
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post #12 of 13 (permalink) Old 11-23-2014, 09:38 PM
 
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Re: My emerald crab!!

I wouldn't worry about the emerald crab. There are exceptions but emerald crabs are opportunistic so if he is to be the culprit it would mean the rest of the inhabitants were sick and dieing. Which in that case would mean you have a larger issue at hand. If your numbers are truly within acceptable ranges....

I also agree on the mantis shrimp seeing all of you bottom dwellers are getting picked off. Unlike the emerald crab, they will go after everything and anything with no descrimination. FYI if your missing a fish I would highly suggest finding it, tearing apart the tank is going to suck but a dead fish and snails will end you up in a nasty situation trying to control your levels. Mantis shrimp will kill then burry its food for later if they can't eat it all in one meal so if you notice crab shells ending up piled up in one spot thats a good sign of a mantis. You'll just have to pay attention to clicking in the tank and by clicking i mean it'll sound like the tank glass is cracking. If you really want to find out if you have a mantis and have moon lights leave them on for a couple hours, an hour in put a single drop of Selcon in. If there is a mantis in the tank he will pop his head out of his hiding spot. Its going to be small so you'll have to really be looking hard.

On a side note if your emerald is causing problems Ill take it off your hands, my 7" Peacock Mantis Shrimp would enjoy the free meal!

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post #13 of 13 (permalink) Old 01-07-2016, 09:07 PM
 
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Re: My emerald crab!!

Hi,I also am having g problems with I think my emerald crab,I noticed some of my zoanthids where missing and since then have noticed my emerald crab munching on them! I tried to solve the problem by feeding her some shrimp pellets and that curbed its desire for a whole 24 hours,lol.and I'm growing tired of trying to keep her satisfied.I take all my fish,inverts,very seriously and don't want to off my crab but I don't want to sacrifice my corals,I think gonna bag her up,take her to my legs and try to trade for a col snails.
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