why do fish make the exodus from water to land

And at the other end are species like mudskippers that nonchalantly hop around mudflats for days at a time.But why do fish make the exodus from water to land?And how do they cope with this drastic transition?If temperatures get too high for the mangrove rivulus in the shallow tropical pools it inhabits,it’ll flip itself onto a bank and cool off in the shade.During the dry period,it can survive for two months out of the water by staying in moist environments.