Two kind specimens were also captured between 1984 and 2004. Since the Ornate Sleeper Ray is rarely seen and there are none in captivity, it's the rarest fish on earth. I'd say this kind of Betta is a tiny bit more challenging to keep because of the fragile crownlike fin https://buyaquariumfishonlinemalaysia.blogspot.com/2025/02/4-hacks-to-maintain-your-kintons.html