Dream about black koi is a signal for your need to take better care of your Self. There is a situation that you are trying to avoid or hide from. You are not in control of your own life. The dream denotes your own personal feelings of being unworthy. You are detached from society.
Black koi dream represents some aspect of yourself which you are not paying enough attention to. You are lacking self-esteem. Your negative feelings are hindering your progress. This dream is about dignity, royalty, leadership, pride and domination. You are being too self-centered.
If you dreamt about black koi:
Financial prosperity is just around the corner, especially with your recently acquired money-management skills. It’s likely that you’ll receive a windfall in the near future, although it may not seem like a windfall to you, since you’ve been expecting this money for a long time now. Use your new abilities to invest it soundly and wisely. You’re bound to be quite pleased with the results you achieve over the long term.