Small crabs

ThunderGoose

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I've been trying to get pictures of the small crabs in my nano tank and I've given up. This is the best I can do.

I have 3 or 4 crabs, all smaller than a dime. One I've ID'd as Tetralia migrolineata, a common commensal that lives on Acropora corals. Or in my nano, in the rocks.

One is red and I have two bad photos to look at...
2017 Dec Red mystery crab.jpg

[the darker red is dragon's blood macroalgae]

2017 Dec red mystery crab 2.jpg

[she's behind the gorgonian]

The last is really hard to see, it is greyish brown and if you don't see it move you won't see it. I tried to circle it.

2017 Dec mystery crab.jpg


Would love to have identification if anyone recognizes them. But they haven't been bothering anything that I'm aware of so, as long as they stay small, they can stay.
 
Hard to tell from the picture.
 

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