Fundamental plane (FP) of star forming dwarf galaxies (McCall et al. 2012) defined by 50 dIs from the LV (black solid circles). Formerly studied Virgo, Fornax, and Hydra SF dwarfs (mostly BCDs) are plotted with black open circles, while TNG Hercules targets with available Arecibo data are overlaid with green squares. About half clusters galaxies are located outside the dwarf FP defined by dIs in isolation, suggesting that the FP relation does not hold for SF dwarfs located in denser environments. The cross in the upper left shows typical uncertainties in the two parameters.