Close-up contrasts

I don’t mean close-up with a microscope, but at close range with the eye. Here are two fruits: rambutan and guanabana. Both tropical.

Rambutan CU
Guanabana CU

And here are two fishes, dried butter fish and scad (fresh). I am not familiar with either, whether they’re marine or fresh-water, and what part of the world they’re native to. (And I’m not G00gling them now….)

Dried butter fish
Scad fish

My ignorance is thoroughly revealed.