A series of vector illustrations showcasing the different species and sizes of tuna, from small yellowfin to large blue marlin against a black background. The illustrations should emphasize realism with detailed scales on each fish, and use a color palette that includes shades of dark gray for water, light navy blue tones for some parts of the tuna, white highlights for details. The style of the illustrations should be in the style of realistic vector art. --ar 85:128  --s 250