Telescope-eyed goldfish

The eyes of this variety are globular and protruding; sometimes the dorsal fin is absent. The commonest varieties are entirely black. A close relative is the celestial goldfish. Size: 10 cm.

• Xenotoca eiseni
• Helostoma temmincki
• Neolamprologus tretocephalus
• Sciaenochromis ahli
• Serrasalmus nattereri (Serrasalmidae)