Weird crab

[GoodFish]

I found this crab (Along with a snail i need to get rid of,) and it has hairy legs and seems to eat the hair algea and is picking at the live rock(algea)
he looks a lot like an emerald crab, however, its not a greenish color...I will try to get a pic later on, it behind my front rock righ not working his was around, ill try to get a nice pick for you....also, he eats non stop!!

 

[quarryshark]

Not all emeralds are green, it may be one.
Will wait for a pic.

 

[GoodFish]

this is him sorry for the blurry pics ill try to get petter ones

 

[GoodFish]

he was under the rock at the time....

 

[Fluff]

There are red mythrax crabs as well as black. Not all are green. You would have to look at the claw tips. If it has flat pads on the claw tips, it's a grazer and may never become a threat. Maybe.

 

[Fluff]

I just want to add, as it grows, you may want to remove it. All crabs have the potential to become a problem. But, smaller ones are mostly scavangers.

 

[quarryshark]

Sorry, hard to tell from the pics. As Cindy said, keep an eye on him anyway.
Try are get a better pic if you can.