By the SUNS ENERGY. (Which makes it hotter and hotter.)
The photic zone of the ocean is the surface of the ocean that receives sunlight.
suface zone and thermocline zone
Surface Zone
Surface Zone
deep zone
the heat from sun and latitude and longitude
there are three major zones , Surface Zone, Thermocline Zone, The Deep Zone
surface/ open ocean zone was warmer than the deep ocean. Sunlight can reach the open ocean so the temp. is warm.
open-ocean surface zone
it is Gary the whale
That is the photic zone, or euphotice zone.