so, i just adopted a new lil betta from a local pet store. he looked really neat in the blue water but when i brought him home and put him in his new bowl he looked a little funny.. well i mean hes VERY Handsome! but his tail is like a transparent black color?? I was reading a lot online and wondered if its fin rot . Im not sure how long he's been in his cup but it looked clean and well maintained. He also wasnt active in his new little house until I turned the flow down from the filter. & yes its heated. Also i was wondering if anybody could tell me what "breed" he is.! Thanks for your help!
P.S. HE has a white spot above his eye(is this normal?)! sorry for low quality pictures! best i could do!