The Yellow Cobra Guppy is also called the Millions Fish and sometimes, simply the Guppy. It is one of the color variations of Poecilia reticulata guppy. The hardiness of the Yellow Cobra Guppy, as well as the fact that it matures quickly makes it an excellent fish for beginning hobbyists. The Yellow Cobra male has a vibrant yellow body with a snakeskin pattern. The tail fin is patterned with yellow and black. The female Yellow Cobra has a gold-yellow body with a patterned yellow and black tail fin that fades to a light orange around the edge.

The Yellow Cobra Guppy requires a tank with at least 20 gallons of water, and is very tolerant of changing tank conditions. Plants should be hardy varieties such as Java Fern and Java Moss that can handle the increased hardness in the tank. Give these fish plenty of swimming area. Guppies should not be kept with Bettas or other fin nipping-fish, as they will harass them. Other peaceful fish would make good tank mates.

You can differentiate the male and females easily. The males are smaller in size, have brighter coloration, along with a bigger tail fin, and pointed anal fin. The females are larger in size with a duller coloration, have a rounded anal fin, as well as a pregnancy patch on the lower portion of the body. Ideally, the environment should have a covering of floating ferns and a breeding box to protect the fry. The gestation period is 4-6 weeks. Adults may eat the fry if left to fend for themselves without the breeding box. The fry should be fed brine shrimp, micro food and pulverized flakes. The young grow quickly, there sex can usually be determined in 4 weeks of age, and reach maturity in about 6 months.

The Yellow Cobra Guppy is an omnivore and requires both algae-based foods as well as meaty foods. An algae-based flake food, along with freeze-dried bloodworms, tubifex, and brine shrimp will provide guppies with the proper nutrition.