[Complete Comparison] Betta vs Gourami | Differences in Care Difficulty, Cost, and Characteristics

What's Different Between Bettas and Gouramis? A Complete Comparison of These Two Anabantoid Superstars

In the world of tropical fish, there is a group called "labyrinth fish (Anabantoidea)." True to its name, the defining characteristic is that they possess an auxiliary respiratory organ called a "labyrinth organ," allowing them to breathe directly from the air above the water surface. The two stars of this group are the Betta, popular for its vibrant coloring, and the Gourami, which adds character to community tanks with its graceful swimming. Despite being close relatives, their care requirements are entirely different.

This article provides a detailed comparison of ecology, appearance, care environment, community tank compatibility, and price range for those considering bringing home one of these fish for the first time.

---

Betta: Overwhelming Presence in a Single Fish

The greatest appeal of the Betta (Betta splendens) is its luxurious appearance. Males possess long, flowing fins and come in a variety of colors including blue, red, white, and black. Selective breeding is actively pursued, resulting in numerous fin shape varieties such as Halfmoon, Crowntail, and Double Tail. Among tropical fish, the Betta particularly excels in the joy of appreciating individual specimens.

Care Environment

One reason Bettas are easy to keep is that they can be raised alone in small tanks. They can be kept in as little as 5 liters of water, and thanks to their labyrinth organ, aeration is not necessary. The key is to select a filter with gentle water flow. Because Bettas have long fins, they struggle with strong currents, and constantly fighting against a strong flow will exhaust them.

Maintain water temperature between 25–28℃. A heater is essential during winter. While relatively tolerant of water quality deterioration, they are sensitive to sudden temperature changes, so make it a habit to match water temperature during water changes.

Male Combat Instincts

Male Bettas have extremely strong territorial instincts and will even display aggression toward their own reflection in a mirror. When two males of the same species are placed in the same tank, they will fight intensely, sometimes leaving their fins torn to shreds. This is where the alternative name "Fighting Fish" comes from. For this reason, males must always be kept in separate tanks, one per tank. Females are relatively peaceful, but individual variation exists, so caution is needed when attempting community tank setups.