The megalodon shark existed alongside many other plants and animals in the Oligocene Epoch. An example is the hyaenodon horridus.
Megalodon Sharks.
all animals have a way of communicating with other animals of the same species.
When they were alive (they could possibly still be) they ate marine animals. Mostly baby whales to adult whales
No, many other organisms came before megalodon.
Pheromones.
Humans.
they talk though a megaphone
over the iCloud
to mark territory property ect.
they use it to find food/communicate with each other
Old Major.