WMAS Discussion Forum : Catching A Problem Emerald Crab

WMAS Discussion Forum : Catching A Problem Emerald Crab http://www.utahreefs.com/forum/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Mon, 29 Jun 2026 08:41:56 +0000 Thu, 10 Sep 2015 19:01:43 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.03 360 www.utahreefs.com/forum/RSS_post_feed.asp?TID=77478 <![CDATA[WMAS Discussion Forum]]> http://www.utahreefs.com/forum/1by1.gif http://www.utahreefs.com/forum/ <![CDATA[Catching A Problem Emerald Crab : I agree, the tipped glass jar...]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=77478&PID=598933&title=catching-a-problem-emerald-crab#598933 Author: Mark Peterson
Subject: 77478
Posted: September 10 2015 at 7:01pm

I agree, the tipped glass jar trap works slick as a whistle, usually overnight. Smile

Place it, with bait at the bottom, at a sharp angle against the rock where the crab spends most of it's time.

Mythrax (Emerald) Crabs are primarily used to control Bubble Algae(Valonia), though they may sometimes eat other Macroalgae. Having used these for over 15 years without incident, my best guess is that there was not enough Valonia for them to eat. It's also possible that the big one was big because it had switched to meaty foods because of a lack of algae as it sat in holding tanks or perhaps it was not actually an herbivorous Mythrax Crab.

Aloha,

Mark

]]> Thu, 10 Sep 2015 19:01:43 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=77478&PID=598933&title=catching-a-problem-emerald-crab#598933 <![CDATA[Catching A Problem Emerald Crab : I agree with Softplan's method....]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=77478&PID=598792&title=catching-a-problem-emerald-crab#598792 Author: Will Spencer
Subject: 77478
Posted: September 08 2015 at 5:11pm

I agree with Softplan's method. Used it several times myself.

]]> Tue, 08 Sep 2015 17:11:03 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=77478&PID=598792&title=catching-a-problem-emerald-crab#598792 <![CDATA[Catching A Problem Emerald Crab : I had to catch one once. Get a...]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=77478&PID=598781&title=catching-a-problem-emerald-crab#598781 Author: Softplan
Subject: 77478
Posted: September 08 2015 at 4:04pm

I had to catch one once. Get a glass cup put it upright and have it touching some rock. Get a piece of shrimp and rubber band it to a rock to keep it at the bottom of the glass. Leave it over night and pull the cup out with the crab in it. I've done it a few times with different crabs. Works like a champ.]]> Tue, 08 Sep 2015 16:04:28 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=77478&PID=598781&title=catching-a-problem-emerald-crab#598781 <![CDATA[Catching A Problem Emerald Crab : That would be my best guess. ]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=77478&PID=598778&title=catching-a-problem-emerald-crab#598778 Author: aceofspadeskb
Subject: 77478
Posted: September 08 2015 at 2:50pm

That would be my best guess.]]> Tue, 08 Sep 2015 14:50:35 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=77478&PID=598778&title=catching-a-problem-emerald-crab#598778 <![CDATA[Catching A Problem Emerald Crab : So Ace I'm assuming that...]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=77478&PID=598777&title=catching-a-problem-emerald-crab#598777 Author: fishyman19
Subject: 77478
Posted: September 08 2015 at 2:31pm

So Ace I'm assuming that you would just put the algae clip on the sand bed then? And Marcoss yeah they are, this is the last time I will be using these guys. Don't want to lose coral over a guy that wants a polyp snack or two.]]> Tue, 08 Sep 2015 14:31:48 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=77478&PID=598777&title=catching-a-problem-emerald-crab#598777 <![CDATA[Catching A Problem Emerald Crab : Those are a beast to catch. I...]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=77478&PID=598775&title=catching-a-problem-emerald-crab#598775 Author: Marcoss
Subject: 77478
Posted: September 08 2015 at 12:33pm

Those are a beast to catch. I have one that is about the size of a golfball. He's super fat. I had to lure him out of the sump once. I simply dropped frozen food near him, but had the net behind the frozen food. He walked right into the trap. I think my crab came out because he is morbidly obese and hungry so that may not work with a leaner and quicker crab. ]]> Tue, 08 Sep 2015 12:33:02 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=77478&PID=598775&title=catching-a-problem-emerald-crab#598775 <![CDATA[Catching A Problem Emerald Crab : Algae clip. Once they grab on...]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=77478&PID=598774&title=catching-a-problem-emerald-crab#598774 Author: aceofspadeskb
Subject: 77478
Posted: September 08 2015 at 12:32pm

Algae clip. Once they grab on they don't let go and you can pull it out that way. You also don't have to worry about your other critters getting trapped...just fed.

Disclaimer: I've heard this works...I've never had to try.

]]> Tue, 08 Sep 2015 12:32:30 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=77478&PID=598774&title=catching-a-problem-emerald-crab#598774 <![CDATA[Catching A Problem Emerald Crab : I picked up 3 of these guys last...]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=77478&PID=598772&title=catching-a-problem-emerald-crab#598772 Author: fishyman19
Subject: 77478
Posted: September 08 2015 at 11:44am

I picked up 3 of these guys last Friday to add to my clean up crew. Got them in the tank and the next day I noticed one of my Setosa Corals was missing some tissue, up around the top and a few spots on the branches and such. I have been battling with my doser on ALK for the last few days(Doser decided to stop working) and figured that was the reason for the tissue loss up top, but the tissue loss on the branches was weird. So I thought maybe one of my Angels started to take a liking for them or one of the new crabs. So after the lights went out I watched the area and sure enough one of the larger Emeralds that I bought climbed right up the rock onto it and started picking at polyps and the tissue. Then he moved over to my jedi mind trick and started doing the same thing. So needless to say he needs to go. I tried to grab him but he took off before I could. I have seen people use the trap method and when I have put those in in the past my other snails and hermits just go to town on that. Anyone know of any other methods they've used to pull these guys out? ]]> Tue, 08 Sep 2015 11:44:18 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=77478&PID=598772&title=catching-a-problem-emerald-crab#598772