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In this work, we extend the catalog of low-surface brightness (LSB) galaxies,including Ultra-Diffuse Galaxy (UDG) candidates, within $\approx 0.4R_{vir}$ ofthe Hydra I cluster of galaxies, based on deep images from the VST Early-typeGAlaxy Survey (VEGAS). The new galaxies are found by applying an automaticdetection tool and carrying out additional visual inspections of $g$ and $r$band images. This led to the detection of 11 UDGs and 8 more LSB galaxies. Forall of them, the cluster membership has been assessed using the color-magnituderelation derived for early-type giant and dwarf galaxies in Hydra I. The UDGsand new LSB galaxies found in Hydra I span a wide range of central surfacebrightness ($22.7 \lesssim \mu_{0,g} \lesssim 26.5$ mag/arcsec$^2$), effectiveradius ($0.6 \lesssim R_e \lesssim 4.0$ kpc) and color ($0.4 \leq g-r \leq 0.9$mag), and have stellar masses in the range $\sim 5\times 10^6 - 2\times10^8$M$_{\odot}$. The 2D projected distribution of both galaxy types is similarto the spatial distribution of dwarf galaxies, with over-densities in thecluster core and north of the cluster centre. They have similar colordistribution and comparable stellar masses to the red dwarf galaxies. Based onphotometric selection, we identify a total of 9 globular cluster candidatesassociated to the UDGs and 4 to the LSB galaxies, with the highest number ofcandidates in an individual UDG being three. We find that there are no relevantdifferences between dwarfs, LSB galaxies and UDGs: the structural parameters(that is surface brightness, size, colors, n-index) and GCs content of thethree classes have similar properties and trends. This finding is consistentwith UDGs being the extreme LSB tail of the size-luminosity distribution ofdwarfs in this environment.

Galaxy populations in the Hydra I cluster from the VEGAS survey II. The ultra-diffuse galaxy population