Stellar vomiting produces dark galaxies, simulations suggest
Supernovas may eject gas, extending dwarfs but leaving them nearly starless
PUFF BALLS Supernovas can stretch out compact galaxies and turn them into ghostly systems (two illustrated here) that are low on stars but as wide as the Milky Way.
A. Di Cintio, C. Brook, NIHAO simulations and Hubble Space Telescope