[mhb]

Yes [1]. And leafcutter ants farm fungus. I think the distinction is the level of involvement of the crabs in the anemones' reproduction.

[1]https://www.sciencedaily.com/releases/2007/10/071009212548.h...

[moron4hire]

This species sounds more like they are in control of the aphids' reproduction, to the point the aphids have evolved a new organ.

https://www.sciencedaily.com/releases/2012/07/120702134037.h...