Dario dario (aka Scarlet Badis, Scarlet Gem Badis) are one of my favorite species of freshwater fish. They are ideally suited to low-tech nano tanks. The males have a beautiful coloration and pattern, primarily red with blue vertical stripes. Submissive males can have drab colors, and females are shades of grey. They are a fascinating, shy little micropredator.
Right up there with the goldfish, Bettas are one of the most easily recognizable and commonly kept fish in the aquarium hobby. Bettas belong to a suborder of fish called Anabantoids, which have a unique structure in their mouths, a lung-like labyrinth organ, which enables them to breathe air. Bettas come in an array of colors and patterns. Their most noticeable feature are the male’s long, flowing fins. Females can be equally as vibrant in their coloring, but tend to have much smaller fins. Wild Bettas have much more muted coloring and smaller fins. Such extravagant decorations that are typical in the aquarium would be a hindrance to wild fish.
The White Cloud Mountain Minnow (Tanichthys albonubes) is a small, hardy fish from the carp family (Cyprinidae). It is considered a “coldwater fish” and can tolerate temperatures as low as 40F. Adults grow to approximately 1.5 inches in length. It is sexually dimorphic, meaning that males and females look differently, though only slightly in the case of this fish. They tend to swim in the middle and top layers of an aquarium. They can live to about 5 years of age.
Care Level: Easy Preferred Water: 6.5 to 7.5pH, moderately hard to hard water Temperature: 64 to 72 °F (12.8 – 22.2 °C) Maximum Size: 1.5″ to 2″ (3.8 to 5 cm) Lifespan: Up to five years or more