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Clarias batrachus

Clarias batrachus
Walking Catfish
The walking catfish, Clarias batrachus, is a species of freshwater airbreathing catfish found primarily in Southeast Asia, so named for its ability to "walk" across dry land, to find food or suitable environments. While it does not truly walk as most bipeds or quadrupeds do, it has the ability to use its pectoral fins to keep it upright as it makes a sort of wiggling motion with snakelike movements. It can survive using this form of locomotion as long as it stays moist. This fish normally lives in slow-moving and often stagnant waters in ponds, swamps, streams and rivers (Mekong and Chao Phraya basins), flooded rice paddies or temporary pools which may dry up. When this happens, its "walking" skill allows the fish to move to other sources of water.
Walking catfish are around 30 cm (a foot or so) in length and have an elongated body shape. Often covered laterally in small white spots, the body is mainly colored a gray or grayish brown. This catfish has long-based dorsal and anal fins as well as several pairs of sensory barbels. The skin is scaleless but covered with mucus, which protects the fish when it is out of water.
One main distinction between the walking catfish and native North American Ictalurid catfish is the walking catfish's lack of an adipose fin.
This fish needs to be handled carefully when fishing it out due to its hidden embedded sting or thorn-like defensive mechanism hidden behind its fins (including the middle ones before the tail fin, just like the majority of all catfish).
The walking catfish is a native of South East Asia including Malaysia, Thailand, eastern India, Sri Lanka, Bangladesh, Burma, Indonesia, Singapore, and Borneo. It is also located in the Philippines and is called hito or simply "catfish" by the locals. During its season in the Philippines, it is widely distributed throughout the country and many consumers buy this product alive. This catfish is a tropical species and prefers a water temperature in the range of 10–28 °C 
Walking catfish thrive in stagnant, frequently hypoxic waters, and are often found in muddy ponds, canals, ditches and similar habitats. The species spends most of its time on, or right above, the bottom surface, with occasional trips to the surface to gulp air.
In the wild, the natural diet of this creature is omnivorous; it feeds on smaller fish, molluscs and other invertebrates as well as detritus and aquatic weeds. It is a voracious eater which consumes food rapidly and this habit makes it a particularly harmful invasive species.

Clarias batrachus;walking catfish 两栖胡鲇鲇形目鲇科胡鲇属的一种。最大个体约长400毫米;常见的不超过250毫米。体长形,后部侧扁;头宽而平扁,前部尤扁,呈楔形。眼小,眶缘游离;鼻孔远离;体无鳞;背鳍很长,占头后背缘的大部,无硬刺。脂鳍缺如;胸鳍有硬刺;臀鳍亦长;尾鳍圆形,不与背、臀鳍相连;体色棕黑、腹部淡灰,体侧有许多白色小点。分布于亚洲东南部到非洲的热带和暖温带地区。在中国,主要分布于云南西南部澜沧江等水系。为喜暖水性带底层鱼类。耐干旱,能在水外“爬行”,以辅呼吸器直接利用空气。以水生昆虫、甲壳类、小鱼等为主要食料。为东南亚及南亚常见的中型经济鱼类。
  喜暖水性带底层,尤喜生活于水草丛生的沟渠、池沼或稻田的暗处或洞内。耐干旱,能在水外“爬行”,以辅呼吸器直接利用空气。以水生昆虫、甲壳类、小鱼等为主要食料。分批产卵。产前营巢(坑窝),产后雌鱼护卵护仔。 两栖胡鲇为东南亚及南亚常见的中型经济鱼类。肉嫩细,味鲜美,有些地区用作病人营养补品。国内已有养殖。