I’m sorry but unless you start researching how to care for and begin supplementing the correct food source immediately, this little fish won’t have a good outlook. I’ve heard someone say once they have to be feed up to 7 times a day. Some people spend a year or more preparing their tanks to have this fish. I’m not trying to sound like I don’t think you are up to the task, I’m just trying to express that they are difficult to care for if you aren’t experienced in doing so. I don’t have first hand knowledge, so I can’t be of more help other than let you know that your fish’s life is in your hands and you need to either provide the needed food source or give it to someone that can. If you want to take on the challenge, I recommend you start a seperate post asking for guidance on caring for this fish, a mandarin dragonet. Post information about your tank and maybe even use the emergency tag, so people know the matter is urgent.