Crabs teaming up?

[Robb1821i]

So for the past 3 days I've had an anemone crab and I think a decorator crab? Back to back on my rock feeding. Is this normal behavior?

 

[Jeffcb]

Yep

 

[xxkenny90xx]

Yep

Is it really? Anemone crabs aren't even actually crabs so it seems weird to me they would team up with true crabs

 

[Crabs McJones]

Oh good, I thought you were going to put me into a group project for a second

 

[Robb1821i]

Why? Protection? I thought they'd kill each other.