ongoing Boxy dwarfs in Perseus Euclid Early Release Observations · galaxy morphology Ionized gas emission in SKIRT Photoionized gas · radiative transfer · IFU mock observations TODDLERS 2.0 Extended star-forming region emission framework Surface brightness fluctuations with Euclid SBF distances · dwarf galaxy membership · Euclid DR1 Peanut dwarfs, hydrodynamic follow-up AREPO simulations · tidal transformation · dwarf morphology Emission lines from cosmological simulations MEGATRON · FIREbox · JWST rest-optical predictions