The Ultimate Guide to the Rummy Nose Tetra Care Tiny FinzThe Harlequin Rasbora won’t annoy rummy nose tetras as they don’t have a similar water space; rummy nose tetras can’t squeeze into the Harlequin Rasbora’s smallmouth. The rummy nose tetra might feel undermined by this quick moving fish however they won’t hurt rummy noses straightforwardly. Zebra Danios