Hitchhiking crab

Discussion in 'Hitchhikers and "ID Please"' started by madhatter9382, Jan 28, 2017.

  1. madhatter9382

    madhatter9382 Member

    okay so I started a tank back in June, got my live rock and everything's been great.... then today I'm looking and all the sudden see this fairly big crab hanging out. I got the best picture I could , I'm curious if anyone knows what type of crab it is and if so could they give me some info. I know in general crabs are aggressive and I'm a bit concerned but my cleaner shrimp and watchman goby have been in the tank(small tank) for months so maybe no need to worry? Anyway here's the picture, its a grey/greenish colored crab



     
    Last edited: Jan 28, 2017
  2. madhatter9382

    madhatter9382 Member

    Okay so he moved and i was able to get a better picture:


     
  3. 2quills

    2quills Well-Known Member

    Emerald crab most likely.
     
  4. madhatter9382

    madhatter9382 Member

    If it's is an emerald , would you suggest removal?


    I know there's been numerous debate on emeralds , I myself am very wary of crabs
     
  5. 2quills

    2quills Well-Known Member

    I'm not a big fan of them personally especially if you have a reef tank.

    But they have been known to kill other inverts like cleaner shrimp from time to time from what I've heard.
     
  6. madhatter9382

    madhatter9382 Member

    thank you for the response, i really appreciate it, im lucky that so far my cleaner shrimp has been fine but i may try to remove the crab, i'm just not sure how as of yet.
     
  7. one-fish

    one-fish Active Member

    When I was young we went crabbing with string tied to a raw chicken neck and a crab net but that was for Blue Crabs....Lol
     
  8. madhatter9382

    madhatter9382 Member

    i was thinking about putting shrimp in a jar and when it climbs in it wont be able to climb out but i have a feeling it wont go for it.
     
  9. one-fish

    one-fish Active Member

    Worth a try just don't leave shrimp in to long I have also found it a pain to catch a fish ended up rearranging rocks so I could divide tank in half finally caught it. BTW some say emerald crabs are beneficial but it's a crab and they are opportunistic feeders
     
  10. jay0705

    jay0705 Well-Known Member

    There excellent for alage but I've never had luck keeping them long term
     
  11. one-fish

    one-fish Active Member

    Was researching them to help my GHA is back bought 12 more nassarius snails instead needed more sand sifting critters Read Emerald crabs will eat bubble algae and other nuisance algae and if fed are safe but a crab is a crab...my clowns lie down on their sides at night and sleep together...
     
  12. florida joe

    florida joe Well-Known Member

    I have an emerald in my reef tank, what you want to make sure is that the pinches on your crab are rounded and do not come to a point
     

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