diel migration meaning in Hindi

It typically exhibits diel migration of " G . lacustris ", making it more visible and susceptible to predation.
In deeper, stratified waters, the sharks performed a regular diel migration, spending the day below the thermocline and rising towards the surface at night.
Like other species in their family, Magister Armhook Squids are thought to undertake diel migration; by day the squid remain in the blackness of the depths.