VU

Betta fish (most commonly Betta splendens) are small, brightly colored tropical freshwater fish best known for the flowing fins of many males and their bold, territorial personalities. Native to Southeast Asia, they’re “labyrinth fish,” meaning they can breathe air at the surface as well as use their gills, which helps them handle warm, slow-moving waters—but they still thrive in clean, heated, well-filtered aquariums. Males are typically kept alone because they may fight other males, while many bettas spend their time cruising the tank, exploring plants and hiding spots, and flaring their fins as a display. Behaviour In an aquarium, bettas…