Probably mood caused the darker color pattern looks more relaxed last pic.My pseudopimelodus bufonius randomly changed from brown and black to yellow and black then he changed back a day later is that normal here are some pictures for reference
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Yes your probably right.Judging by your multi-toned gravel, he probably does not know what colour to blend into.
It's a quarantine tank...Judging by your multi-toned gravel, he probably does not know what colour to blend into.