Glowlight Tetraĭon’t be fooled by the common name - this is not a genetically altered GloFish but rather a naturally colored species with a shocking neon orange line on its silvery body and parts of the fins. There’s nothing like seeing a huge group of rummynose tetras swimming back and forth in a lushly planted tank. These fish are also prized for their tight schooling behavior. Fishkeepers sometimes refer to it as the “canary in the coal mine” because its rosy coloration rapidly fades away when stressed, so use this warning sign to check your water conditions and other potential problems that may have arisen. Rummy-Nose TetraĬurrently, there are three similar-looking species of South American fish that are commonly sold as “rummy nose tetras.” This 2-inch (5 cm), slender-bodied fish is known for its bright red snout with black and white horizontal striping on its tail. We have even used them as dither fish for our shy clown loaches in the past. Congo tetras thrive in a diverse set of water parameters and can be housed with bigger, peaceful fish that won’t nip their fins. Females are smaller and have more of a silvery-gold sheen. The colorful males feature a red-orange horizontal stripe with shiny blue scales underneath and long, flowy finnage edged in white. Congo TetraĪs the largest tetra on our list, this 3-inch (8 cm) African species does best in fish tanks of 30 gallons or more. Because of their high activity level, keep them with other fast swimmers that won’t get outcompeted for food during mealtimes. When you get a big group of these energetic tetras and put your hand up to the glass, they will gather in a frenzy and follow your fingers from side to side. As per their common name, both sexes have very distinctive, sliver-white tips on their fins and tails. Mature males become vivid yellow-orange in color, whereas the females are lighter yellow. If you’re looking for a very interactive schooling fish, you have to try silvertip tetras. Keep them well-fed because higher temperatures can increase their metabolism. Additionally, they enjoy warmer waters and are frequently kept with discus, German blue rams, and Sterbai corydoras. They sometimes get confused with neon tetras and green neon tetras, but in comparison, cardinal tetras have more red on their bodies and get slightly bigger (up to 2 inches or 5 cm). Left to right: cardinal tetra (Paracheirodon axelrodi), neon tetra (Paracheirodon innesi), and green neon tetra (Paracheirodon simulans)Ĭardinal tetras are a showstopper fish because of their brilliant blue and red horizontal stripes that stand out in a planted aquarium. This species is another great pick for newbies because they are adaptable to a broad spectrum of pH, GH, and other water conditions. The normal type of x-ray tetra has a silvery color with a reddish tail and eye-catching yellow, black, and white markings on its fins. The reason why it has the common name “x-ray tetra” is because it has a semitransparent body that allows you to see some of its internal organs (especially if you get the gold or albino varieties). While many tetras have a slimmer, torpedo-shaped profile, the pristella tetra is a deeper-bodied fish that grows up to 2 inches (5 cm) long. For more details, read our complete care guide. If you want to make a visually stunning design, we highly recommend putting them in a fish tank full of green aquatic plants and a red centerpiece fish like a betta fish. Luckily, black neon tetras are very cheap so you can buy a huge group to fill up a larger aquarium. Like all of the animals on this list, you will need to get a school of at least six fish (of the same species) so that they feel safe and protected from potential predators. The 1.5-inch (4 cm) fish has a red eye with a pair of white and black horizontal lines down its body. This underrated fish is one of our absolute favorites to recommend to both beginners and seasoned aquarists because they are so hardy and practically bulletproof. ![]() Learn about some of the best-selling tetras at our fish store. African tetras, on the other hand, tend to be larger and more accepting of a wide range of water parameters, so they can be kept in community aquariums with bigger fish. South American tetras are more popular because of their small size and relatively inexpensive price, but they often prefer softer water and lower pH environments. Tetras (also known as characids or characins from the Characidae family) are a staple of the freshwater aquarium hobby because many of them are colorful, peaceful schooling fish that go well in community tanks.
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