I have kept motoros for a few years in the UK and have just moved out to live in Northern Thailand.Although I have never attempted to keep Hymentura rays I have heard they are very tricky to keep.They are regularly available from Chatuchak market in Bangkok and I wondered what the chances were of keeping a few together in a suitable size of vat. I was thinking of maybe 10 feet x 4 feet.Anyone on here any had any experiences good or bad with these fish.? Will be visiting a locally famous Black Diamond breeder soon and hope to post photos on here.Look forward to the replies!