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Macropodus opercularis

Macropodus opercularis
Paradise Fish
Paradise fish or paradise gouramis (Macropodus opercularis) are small freshwater labyrinth fish found in ditches and paddy fields in East Asia, ranging from the Korean Peninsula to Northern Vietnam.
Paradise gouramis were one of the first ornamental fishes available to western aquarium keepers, having been imported to Europe as early as the 19th century. These small fish are ideal lone inhabitants of aquariums. The paradise fish is one of the more aggressive members of its family, by being more aggressive than the blue gourami. Yet they are far less aggressive than the rarely kept Combtail.
Paradise Fish are fairly combative, harassing and attacking each other as well as potentially killing small fish. In the wild, they are predators, eating insects, invertebrates and fish fry. The popularity of this species has waned in recent decades as much more colorful (and often, less pugnacious) species of gouramis have become widely available to hobbyists. This species is one of the few fish that can change its color (lighter or darker) in response to stimuli.
Male paradise fish should be kept apart, since they will fight aggressively by locking jaws. A male can be kept with females; females may also be kept together in groups. A tank that includes paradise fish should be at least 2.5 gallons in size for a single male or 20-30 gallons for a community tank. The tank should be well planted and covered; bogwood and rockwork may be included. Paradise Fish are often aggressive thus tankmates must be chosen with care. Suitable tankmates include giant danios, large tetras, most smaller catfishes and even some of the less aggressive cichlids, such as firemouth cichlids.They can hold their own against most South American cichlid species of a similar size, that aren't overly aggressive. Slow moving or long finned fish such as fancy goldfish and freshwater angelfish are likely to be attacked, bettas and gouramis may also be victimized due to their resemblance to paradise fish. Male paradise fish may also attempt to court female bettas and gouramis. Small fish less than 3 cm are likely to be consumed. Males are particularly aggressive and should not be kept with slow fish or fish with long, flowing finnage which is commonly shredded by the territorial paradise. In a community tank, male Paradise fish fight other paradises, as well as any other fish for dominance. Paradise fish will often fight with other fish for dominance, particularly other aggressive, robust fish, such as cichlids, gouramis, and even flying foxes. They therefore should not be housed with any other fish which may attempt to challenge them, because this leads to fighting. If kept with significantly larger but non aggressive fish, such as geophagus cichlids, large synodntis catfishes, or larger gouramis, they are usually submissive and do not act nearly as aggressive as if they are the dominant species in the aquarium. However, if the larger fish are also aggressive, they will not even attempt to fight and will take to hiding behind filters, plants, or in decor, and will succumb to stress.
盖斑斗鱼是一种小型的淡水鱼类,又名三斑斗鱼、台湾斗鱼,英文名称为天堂鱼(Paradise fish),日本人称台湾金鱼。原产于中国南部、海南岛、中南半岛及台湾。