Hitchhiker shrimp

[Sump]

Greetings!

I am just getting back into the hobby and discovered a couple of these little guys on a piece of coral that came in last night. The largest one is about 4mm. They remind me a lot of a mantis shrimp, but the claws seem wrong. I also couldn't find any information on a species this small. Any thoughts would be appreciated.

 

[mh0ward]

Maybe a Tanaidacea of some sort?

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[Sump]

After a quick google, I think you may be right. Any reason I shouldn't add them to my tank?