6. Betta Fish Photo by NatalyaAksenova/iStock / Getty Images Plus via Getty Images Betta fish can be great beginner pets for a small aquarium, and you’ll find bettas in virtually any pet store. As one of the most readily available fish to bring home, it’s no wonder betta fish are a common first pet for kids. But betta fish are aggressive. Males of this species should be housed alone, while females can be housed in groups of five to six fish called sororities. Male bettas are typically more colorful with flowing and elaborate fins. Females are less colorful but still have subtle coloration and are a great addition to any tank!,7. Dwarf Gouramis Photo by libin jose/iStock / Getty Images Plus via Getty Images Dwarf gouramis are a beautiful small red fish with blue vertical striping and make for a vibrant addition to a small tank. Many different color patterns exist, and they range in size from 3.5–4.5 inches. Dwarf gouramis are a docile fish species that mainly likes to live in the upper portion of the tank. This easy-to-keep fish can live well with other fish species, as they are not aggressive. But because they are a larger fish, they do require more space. For a 10-gallon tank, you can safely house a single dwarf gourami, but size up for a group. When mixing species, one or two will work well with other non-aggressive fish like tetras, rasboras, corydoras, and catfish.,Thinking of starting a fish tank? Many freshwater aquarium fish species make great additions to a beginner fish tank. The best aquarium fish for beginners are not only rewarding for pet parents, but they also make great first pets for children who can learn about responsible skills such as feeding and fish tank cleaning. You will also need to conduct regular water quality testing, which is required of any fish tank. Here are some of the best beginner fish for first-time aquarists. Best Beginner Fish for Aquariums 1. Celestial Pearl Danios Photo by Adobe Stock/besjunior Celestial pearl danios (CPDs) are a small (up to 1 inch), dark blue fish that have either white, yellow, or tan pearlescent dots over their body. Their appearance is sometimes associated with a galaxy, hence their “celestial” name. CPDs could be great residents of a space-themed tank! These fish like to live in small areas where they can hide within rocks and plants in groups of 10 or more. They also get along well with other community fish, making them an easy addition to any first fish tank. They will eat a variety of food, including flakes, micro pellets, or even some other fish or brine shrimp.