What kind of fish live on the tank?

The fish that live in an aquarium, or "tank," can vary widely depending on the size, type, and setup of the tank. Some of the most commonly kept aquarium fish include:

1. Goldfish: One of the most popular aquarium fish, goldfish are hardy and come in a variety of colors and shapes.

2. Guppies: These small, live-bearing fish are known for their colorful tails and are often kept in community tanks.

3. Platies: Another type of live-bearing fish, platies are similar to guppies but come in a wider range of colors and patterns.

4. Swordtails: These live-bearing fish are named for their distinctive sword-like tail fin in males.

5. Mollies: Mollies are hardy, live-bearing fish that are available in various colors and patterns.

6. Tetras: Tetras are a diverse group of fish that come in a variety of shapes, colors, and sizes. Some popular tetra species include neon tetras, cardinal tetras, and rummy nose tetras.

7. Barbs: Barbs are active and colorful fish that are well-suited for community tanks. Some common barb species include cherry barbs, tiger barbs, and rosy barbs.

8. Danios: Danios are small, active fish that are often kept in groups. Some popular danio species include zebra danios and leopard danios.

9. Catfish: Catfish are a diverse group of fish that come in a variety of shapes and sizes. Some popular catfish species include corydoras catfish, plecos, and upside-down catfish.

10. Bettas: Also known as Siamese fighting fish, bettas are popular for their beautiful fins and vibrant colors. They are typically kept in individual tanks.

These are just a few examples of the many types of fish that can live in an aquarium. The specific selection of fish will depend on factors such as the size and type of tank, water parameters, and personal preferences.