Abstract: Blood samples were obtained from twenty seven clinically healthy bycatched green turtles (Chelonia
mydas). The packed cell volume (PCV) and 14 plasma biochemistry parameters were determined from
these samples. The PCV values were lower in sub-adult green turtles than in the adults while the
plasma AST concentration was higher in the sub-adults than in the adults. These variations may be due
to the age of the turtle and the period of the year when the samples were taken. The results of this study
provide the first plasma biochemistry baseline profiles for free-ranging green sea turtles in Taiwan.