iridescence is a gene passed down from parents and means just that. It is that pearly, blacklight, bright violet sheen over the actual coloring. Its like dragons scaling just clear and iridescent. It's not excluded to one coloring pattern or type of betta, any combination can have a marble look to it. Dreamsicle is a cute name! I'm kinda jelly about him. Orange is a rare color to come by.
Feel free to message me any questions, I'll try to help the best I can!
Rummy- Mini Rex Rabbit
Diz jr- Betta
Yoshi- Crested Gecko