Betta macrostoma is a magnificent wild betta species native to the rainforest streams of Brunei and northern Borneo. Famous for its vibrant orange-red coloration, bold facial markings, and impressive size, this species is widely regarded as one of the most prestigious wild bettas in the world. Adult fish can reach approximately 8–10 cm in total length and thrive in clean, soft, slightly acidic waters. As a paternal mouthbrooder, males incubate the eggs in their mouths until the fry are ready t...
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