The host galaxy of SN 2020bqj in the mass–SFR plane. The hosts of SNE Ibn from the iPTF survey (Schulze et al. 2021) have masses between 10⁸ and 10¹⁰ M_⊙ and lie in the region of the galaxy main sequence, a fundamental correlation between SFR and mass of star-forming galaxies (thick dashed line; Lee et al. 2015). To guide the eye, contours from 10% to 90% based on the iPTF sample are overlaid. The mass of SN 2020bqj’s host stands out from this comparison sample. Its mass is more than 2 dex lower than the least massive host of that sample, albeit the errors are large. The grey-dashed lines display lines of constant specific star-formation rate (SFR normalized by stellar mass).