New Reef Hitchhiker Discovery

Regardless of it's current size, it bears the markers of a destructive crustacean. It could be the best, mild mannered, Mr. Bean of crabs, but it is still a crab, and the size of the claws in ratio to the size of the body, the black and sharply angled tips, and the body structure tell me that you do not want this getting bigger in your display tank.

At the end of the day, it's your tank, and your call.
 
This is only 1.5cm in size...
1.5cm for now...it won’t be for long. The dip in high salinity water will get it out if you can figure out his rock. You could keep it in the sump if you have one. Would be cool to watch it grow. You will be surprised how big it gets!! If not, there’s a fish store by me who takes all these monster crabs to feed their large predators.
 

WHAT’S USUALLY THE FIRST CLUE THAT SOMETHING IS OFF IN YOUR REEF?

  • A fish’s behavior or appetite changes

    Votes: 11 15.5%
  • A coral looks different or stops opening normally

    Votes: 44 62.0%
  • Water clarity or surface appearance changes

    Votes: 10 14.1%
  • Equipment sounds or flow seem different

    Votes: 7 9.9%
  • A test result catches my attention

    Votes: 14 19.7%
  • Algae or other growth starts changing

    Votes: 14 19.7%
  • I usually notice when the problem is already obvious

    Votes: 3 4.2%
  • It depends on what’s going on

    Votes: 13 18.3%
  • Other (Post in the comments)

    Votes: 1 1.4%
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