Mellow relaxing fish to watch

i get the most enjoyment from Oscar, my 6" L-018 (gold nugget) and my 6" Black Ghost Knife. Oscar didnt come out much for about 4 months but now he is always out. he lounges on the rocks most of the time, but when he swims with his fins fully extended its just awesome. the ghost knife is mainly out at night, but when he's out its pretty neat watching how they swim. i can literrally watch my tank for hours. wife is starting to feel neglected. ive got a 125 with about 20 or so larger breeds of fish. angels, plecos, clown loaches, ghost knife, etc...
 
A huge school of Cardinal tetras, a couple pairs of pearl gouramis, and a smallish school of cories.
 
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