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Half Beak

The wrestling halfbeak (Dermogenys pusilla) also known as Malayan halfbeak is a species of viviparous halfbeak native to the fresh and brackish waters of rivers and coastal regions in South-East Asia, in Singapore, Thailand, Indonesia, Thailand, Malaysia, Borneo and Sumatra.[2][3] It is a small, slender, livebearing fish, with the elongated lower jaw characteristic of its family. The colour of this species varies, depending on where the specimen is found.[4]It is the type species of the genus Dermogenys.[5]

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Wrestling halfbeaks are surface-feeding fish and feed on a variety of small invertebrates including crustaceans and insect larvae, but especially mosquito larvae and flying insects that have fallen onto the surface of the water.[6] As with all halfbeaks, the upper jaw lifts upwards when the fish is opening its mouth. Wrestling halfbeaks are livebearing fish, the females giving birth to around twenty offspring after a gestation period of about a month.[7][8][9]

Wrestling halfbeaks are sexually dimorphic. The females are larger than the males and grow up to 7cm (3in) long; males only reach about 5.5cm (2.2in) and typically has red or yellow patches on the dorsal fin and the beak.[10][11] The males of wrestling halfbeaks will fight among themselves by locking jaws, hence their name, for up to thirty minutes.

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More information:

• Diet carnivorous
• PH Range 6.5 7.5
• Temperature Tropical 26c 28c
• Breed Type Egg Layer
• Maximum Size approximately 6cm
• Sex Un-sexed

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