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That one near the top looks like a golden dojo. Interesting aquascapes -- never seen gray tones as a theme throughout a fish tank, before. Or, was some fiddling done with the photography? It does show off the fishes' colors well.
20 gal. high: planted; 5 white cloud minnows, 4 golden White Clouds, several RCS, 2 blue shrimp, 5 Amano shrimp, several snails; Azoo air. 65 gal: planted; 6 rosy barbs, 6 yellow glofish, 3 red glofish, 3 zebra danios, 5 white cloud minnows, 3 dojo loaches, 6 crimson spot rainbow fish, 12 large Amano Shrimp, several snails; AC110.