No, I do not personally keep jellies; however, my coworker is what I consider an "expert" who has great experience professionally culturing various species and I feed off of her knowledge. The only jellies I have limited hands-on experience with are Aurelia i.e. Moon jellies. Either way, they can be quite durable and easily cultured if properly cared for, as in all things. The book I linked is a fantastic source for beginners.