https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13955780Edit ImageSaveSaveEditCropCustom TextAbove, a grayling salmon; below, a Gwiniad salmon. Engraving by Heath.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 924 px | 300 dpiLarge JPEG 2931 x 2257 px | 300 dpiFree DownloadAbove, a grayling salmon; below, a Gwiniad salmon. Engraving by Heath.More