When there will be a low salt environment, the jellyfish will increases the intake of water through its surface, because the solvent concentration will be low inside the jellyfish, as compared to the estuary. Thus, it will swell up and may die after bursting, as well. The environment is called as a hypotonic environment. The solute concentration is high inside jelly wish and lower in the estuary, thus, fluid diffusion will occur from fish to water body