do emerald crabs harm corals

Discussion in 'Coral Health' started by scooter-2505, Aug 9, 2009.

to remove this notice and enjoy 3reef content with less ads. 3reef membership is free.

  1. scooter-2505

    scooter-2505 Fire Worm

    Joined:
    Jul 28, 2009
    Messages:
    168
    Location:
    central Arkansas
    I have a newly acquired set of mushroom corals and they didn't seem very happy but they are starting to calm down. Question is about my emerald crab. At night he is all over the rock with mushrooms and they didn't look good. This past week I haven't noticed him on them and they look so much better. Should I consider removing him from the tank?
     
  2. Click Here!

  3. the fisherman

    the fisherman Vlamingii Tang

    Joined:
    May 1, 2009
    Messages:
    1,888
    Location:
    new jersey
    You should be ok. They do not harm corals. If they do climb over a coral they will close up,but will reopen later
     
  4. blumoon reefers

    blumoon reefers Millepora

    Joined:
    Jun 18, 2009
    Messages:
    942
    Location:
    Richmond, VA
    My emerald does that to my mushrooms all the time. They will get irritated, close up and usually open back up within 15 minutes of him being off of them.
     
  5. =Jwin=

    =Jwin= Tassled File Fish

    Joined:
    Nov 26, 2008
    Messages:
    1,968
    Location:
    Chattanooga, Tennessee
    We have 2 emeralds in our tank, with no harm to any corals done. They're the best bubble algae control you can find, IMO. Ours climb all over the place at night, especially on our GSP colony, and that coral hates it. Closes up every time, but always seems to forgive and forget until it happens again :)

    You should be able to live a pretty normal life...even with crabs. ;)
     
  6. steve wright

    steve wright Super Moderator Staff Member

    Joined:
    Feb 17, 2009
    Messages:
    11,283
    Location:
    shenzhen Guangdong PRC
    IME , their general clambering about does periodically annoy some corals, which react with either a full or partial close down (depends on species)

    but as the others have said, I have never experienced any nips of corals from these crabs

    Steve
     
  7. homegrowncorals

    homegrowncorals Ribbon Eel

    Joined:
    May 31, 2008
    Messages:
    2,434
    Location:
    north carolina..obx
    I was wondering the same thing, i have seen my emerald crab picking at my toodstool from time to time and was worried it would harm it.
     
  8. Click Here!

  9. scooter-2505

    scooter-2505 Fire Worm

    Joined:
    Jul 28, 2009
    Messages:
    168
    Location:
    central Arkansas
    Thanks a lot folks because it has taken a while to get these mushrooms situated where they like. I want to get one type of coral at a time since I'm a beginner and I'm looking at a frogspawn at my lfs. Is this a good choice or is there another type I should look into. All the parameters of my tank on the money and the mushrooms have been going for about a month. By the way it's a 55 gallon with 220 watts vho lighting but am interested in the t5 craze.
     
  10. lunatik_69

    lunatik_69 Giant Squid

    Joined:
    Jul 10, 2007
    Messages:
    7,933
    Location:
    Miami, FL
    I have never had a problem with E crabs, but some people say that they have had. Just watch them and do what you gotta do.


    Luna
     
  11. blumoon reefers

    blumoon reefers Millepora

    Joined:
    Jun 18, 2009
    Messages:
    942
    Location:
    Richmond, VA
    Personally, I like the frogspawn. I have one that has both purple and green tips and it is beautiful. I will say though, that I understand they can sting fish.
     
  12. callumg50

    callumg50 Astrea Snail

    Joined:
    Apr 21, 2009
    Messages:
    59
    Location:
    canada
    i had an emerald crab eat some small polyps cant remember what there called though