The Plakat (from Thai: short-fin fighting fish) represents the closest domesticated form to the original wild Betta splendens of Thailand. While centuries of selective breeding have produced the spectacular long-finned Halfmoon, Crowntail, and Double Tail varieties, the Plakat retains short, rounded caudal, dorsal, and anal fins more similar to the wild fish. This streamlined finnage makes the Plakat considerably more agile and active than its long-finned relatives.
Plakats were historically bred as fighting fish in Thailand, where short fins reduce the chance of injury during fights and increase mobility. Today, ornamental Plakats are bred in an extraordinary range of colors and scale patterns — iridescent, metallic, dragon scale, marble — while retaining their athletic short-fin profile. Color intensity and scale quality are often considered superior in Plakats compared to long-finned varieties.
In the aquarium, Plakats are more active and exploratory than their long-finned counterparts, using the full tank space rather than drifting near the surface. Their shorter fins are less susceptible to fin rot and physical damage, and they are generally considered hardier and easier to maintain in good condition. All the behavioral characteristics of male Betta splendens apply: territorial aggression toward other males, labyrinth breathing, bubble-nest building, and carnivorous feeding habits.