Marine life evolved to adjust to changes in ocean salinity, regulating their body fluids as needed. [1] The commingling of Atlantic and Pacific marine life marked the beginning of rapid decline. [2]
The gradual cooling of oceans 170 million years ago led to the destruction of marine life, prompting new species to emerge from three specific retreats. [3] The trilobite age dominated marine life around 400,000,000 years ago, before the emergence of land organisms. [4] The Paleozoic was an era of marine life spanning two hundred and fifty million years. [5] Types named.
See also: UB 59.