Top: central region spectra of Malin 1. The blue curve is the spectrum extracted in our central 1″ × 2.5″ aperture (region a in Fig. 1). The red curve is the SDSS spectrum of the centre of the galaxy, extracted within its circular optical fibre of diameter 3″ (shown in Fig. 1). The green open circles and black open squares indicate the photometric flux levels obtained within the SDSS and our aperture, respectively, using the NGVS g and i band photometric images of Malin 1. The gray shaded area represent the regions in which we do not have data. Bottom: for comparison, we show the median composite spectrum of all star-forming galaxies (at 0 <  z ≲ 1.5) from the SDSS eBOSS observations (Zhu et al. 2015), shifted to the redshift of Malin 1. The blue and red vertical shaded regions indicate the main identified emission and absorption lines.