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Betta dennisyongi is superficially very similar to Betta rubra, from which this species was split. However, Dennisyongi tends to reach a much smaller size than Rubra, and can be told apart by certain markings on the face. The two species can hybridise, and care should be taken to ensure that they are not mixed. The overall fish is a brilliant red, and truly striking, particularly in breeding condition. These are paternal mouthbrooders (the male holds the eggs in his mouth), and should be kept with multiple males per each female. As with all wild Betta species, care should be taken to ensure that the tank is securely covered, as these fish may be fairly jumpy. The lid should not be air tight; Betta are air breathers, and will die if they cannot gain access to fresh air. These fish are best maintained in a small species tank, but may also be an interesting addition to a planted aquarium. They will mix well small, non aggressive fish, such as slower moving tetras and rasbora, small Corydoras (e.g., C. habrosus or C. pygmaeus), Loricariids, and the like. Ensure that these fish are not eating all of the food -- Betta tend to be slow, methodical feeders.
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