Once in the cages, it's nothing but the best for the captive fish as they gorge on the expensive imported diet of pilchards carefully chosen to maximize the tuna's oil content and bring out a pink-to-red color.
In addition to enabling vivid color labeling to be printed over nearly the entire disc, oil-based or water-based marker pens can be used to hand-write labels on these discs.
Since most are on paper, which allows oil paint more physical autonomy than absorptive canvas, the results are distinguished by fresh color and light, a palpable sense of immediacy and spontaneity, and a suggestion of transient moments captured and prolonged.