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Broadhead catfish
The broadhead catfish (''Clarias macrocephalus'') is an economically important air-breathing catfish that is a native of Southeast Asia. The fish is farmed in ponds for use in human consumption in countries such as Thailand ((タイ語:ปลาดุกอุย)) and the Philippines. However, native populations now face extinction due to man-made activities and genetic introgression due to interbreeding with escaped aquaculture hybrids.
In Thailand both this fish and the walking catfish ''(Clarias batrachus)'' are known as ''Pla Duk'' ((タイ語:ปลาดุก)). They are common inexpensive food items, prepared in a variety of ways, being often offered by street vendors, especially barbecued or fried.〔(Pla duk ) 〕
==Description==
The broadhead catfish is identified by its large dorsal fin and its short and rounded occipital process. The occipital process is pointed in Clarias batrachus, a closely related species. Another identifying feature for the broadhead catfish is the white spots on the side of its black body. The male and the female catfish can be identified by looking at their anus. The males have an elongated urogenital papillae around their anus while the females only have a round opening. The males can reach lengths of up to 120 cm (47.2 inches) TL. 〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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