The relationship between medium
[Cl−] and hemolymph [Cl− ] (Fig. 3) indicates hemolymph [Cl− ] varied
from 321 to 418 mEq L−1 when acclimated to seawater [Cl− ]
from 59 to 640 mEq L−1 (1–40‰). The isoionic point was 340 mEq
L−1 and corresponds to a salinity of 21‰. At low external concentrations
below the isoionic point, from 59 to 327 mEq L−1 (1–20‰),
mean hemolymph [Cl− ] were mainly hyperionic and maintained between
321 to 347 mEq L−