Concerning 1984 and 2004, two varieties of specimens were also acquired. The Ornate Sleeper Ray is the earth’s rarest fish as it is rarely noticed and you can find none in captivity. But Otherwise, Here are several of the earth’s rarest fish — and where by you'll find them — https://aquariumshops.wordpress.com/2024/10/18/5-quick-hacks-of-professional-pond-cleaning/