osmolality levels were maintained between 280–420 mOsm/kg.
The SW transfer significantly increased the osmolality level in tilapia
at day 1 (420.5 mOsm/kg) and 4 (377.5 mOsm/kg) in the SW
fish compared to the FW fish (312.5 and 283.5 mOsm/kg, respectively).
Cortisol plays an essential role and is a fundamental regulator
of chloride cell differentiation in the teleost gill [29]. In our