Really sorry to hear that... Fish, especially ones with personality, are really hard to let go...
I have a few Gudgeons in my tank which look a lot like Gobies. They're so cute... I hope you can get a new one to make up for your loss.
If I have been helpful, polite, or appreciated in any way, please consider adding to my reputation and a brief description of how I was able to be of service. Thanks! --Coyote