Well, enough rare as for never have been seen by me in any aquarium or zoo. In ZTL there is only one holder - Oceanario de Lisboa. It's not just the rarity what excite me so much, but the incredible spectacularity of the species - it's one of my most favourite rays.
Cool! I don't recall seeing them before, they really caught my eye. There were 2 in this touch tank and 1 (that I could see) in the much larger stingray touch tank. It was interesting touching them and feeling how very rough they are, like sand paper, compared to the soft, fleshy stingrays.