We sequenced and analyzed the bulb mite Rhizoglyphus  robini  (Acari, Acaridae) transcriptome. The mites have highly divergent male phenotypes: sexually dimorphic, aggressive fighter males, possessing thickened legs of the third pair which are used to kill rivals, coexist with unarmored scrambler males. We analyzed genes expression and  look  what we find out [http://onlinelibrary.wiley.com/doi/10.1002/ece3.965/pdf]