Harlequin Shrimp, Dancing or Fighting

So my harlequin shrimp have grown quite a bit and now look like they are full size id say about 1.5``, now they hadnt really shown any signs of being together before but now i keep catching them dancing. They lock their claws together and get really close like they are kissing but it also looks like they`re dancing around.

IS this a kind of fighting, or mating, or pairing or what.

 

Sounds like aggression, but I'd like to see a video.

 

will do when I can, was afraid of that seeing them reach full size and this behavior start.

 

in the wild they work and feed in small groups if you don't see signs of damage on them i think there ok

 

No signs of Damage and i think i figured out my own question too, after observing them for the rest of the day i have noticed they wont go more than about 4-5 inches from each other, If one moves the other follows. I spoke with someone at a fish store, showed him my pics of what they were doing, he made a good point that since neither of them ran away it was more likely to be a sign of a mating dance or something like that. If one attacked the other the other wouldn't stay around too long or if they fought I'd only have one left by now.