Guchi Baim (Macrognathus pancalus) is a highly important commercial species . Therefore, biological knowledge of this species is essential to develop suitable aquaculture technique. … Different biological parameters were recorded using centimeter scale, fine pointed divider, foreceps and slide calipers.Macrognathus pancalus, the barred spiny eel or Indian spiny eel, or পাঁকাল in bengali is a small freshwater fish in southern Asia. It usually is found in slow and shallow rivers. Males are more slender and often smaller than the females.