HI properties extracted in the synthesized beam-shaped aperture as a function of Lyα observables. From left to right, the x-axis shows the Lyα luminosity, Lyα equivalent width and Lyα escape fraction. From top to bottom, the y-axis shows the HI mass, the HI gas to stellar mass fraction, the HI mass per unit star formation rate, HI linewidth, and offset between Lyα red peak and HI centroid velocity. Generalized Kendall τ, p-values and sample sizes associated with each scatter plot are shown on the top left corner of each panel.