Relationships between fish length and otolith length, width mass were investigated in the two nearly threatened silurid species (Siluriformes) Ailia coila (Hamilton, 1822) Ompok pabda Hamilton, collected from Ganga River at Narora, India. The relationships (OL) total (TL), (OWd) TL, weight (OWe) TL are expressed by linear regression models; for A. coila, OL = 0.0291 + 0.8541, OWd 0.0306 0.2241,...