Within the hierarchical framework for galaxy formation, merging and tidal interactions are expected to shape large galaxies up to the present day. While major mergers are quite rare at present, minor mergers and satellite disruptions - that result in stellar streams - should be common, and are indeed seen in the stellar halos of the Milky Way and the Andromeda galaxy. In the last years, the Stellar Stream Legacy Survey (PI. Martinez-Delgado) has exploited available deep imaging of some nearby spiral galaxies with the ultimate aim of estimating the frequency, morphology and stellar luminosity/mass distribution of these structures in the local Universe. In this talk, I will present the current results of our systematic survey of stellar streams together with some recent follow-up observations (e.g. Megara, Subaru) and N-body modelling of the most striking streams. Finally, I will discuss what we can learn about galaxy formation from the results of this survey, including the comparison with the available L-CDM cosmological simulations, and our future plans to extend this stream survey at lower surface brightness regime with the ARRAKHIS mission, using a small binocular telescopes on-board a micro-satellite in Low Earth Orbit (LEO).