Most poke telescopes have deep bodies and long, flowing finnage, with characteristic protruding eyes but the original is fantailed and similar body to it which they are derived from fantail goldfish.
Young black telescopes resemble bronze fantails. Their black coloration and eye protrusion develop with age. They can grow up to a length of 6 inches, but may lose their velvet-like appearance with increasing age (life span: 6 to 25 years). The fish can range in coloring anywhere from a lighter grey to a dark black, but most black telescope goldfish don’t stay pure black forever and many of them change colors from a rust color underbelly to orange splotches. Because their eyes are usually large, their vision is poor.
Black telescope goldfish are popular because they are hardy fish and because their black color sets them apart from the more common gold color. Goldfish are typically easy to care for. Black moors in particular are able to withstand a wide variety of temperatures. They do well with other fancy goldfish varieties.