Though dolphins live in small groups called pods, these pods can be quite fluid and dolphins can be seen interacting with dolphins from other pods from time to time. If another dolphin is drowning, other dolphins will come to it's aid, supporting it with their bodies so it's blowhole is above the water allowing it to breathe. Dolphins main predators are sharks and unfortunately man, through direct killing for food,netting, pollution, and fishing. Dolphins spend a large part of their day looking for food, or actually feeding. They may either hunt alone, or together as a pod.
Dolphins communicate with eachother by whistling or body language.
When a baby is first born, some dolphin research suggests a mother dolphin will whistle to it constantly, imprinting her sound on the baby so it will recognize her, and the baby learns to develop its own signature whistle. It is thought that each dolphin has its own individual signature whistle, just like a name. Aquariums varied in their care and housing of the dolphins, some may have been quite substandard. And tragically, in the past many of these dolphins were mostly violently captured from the wild, taken away from their families and forced to live in small barren tanks. Records show that at least 2700 bottlenose dolphins have been taken into captivity worldwide.