The food that dolphins eat is different for each
species.
While some dolphins eat fishes like herring, cod or
mackerel, some others eat squids.
Even more, large dolphins like the killer whales, eat some
other marine mammals like seals or sea lions and sometime even
turtles.
Usually, the amount of fish that they eat depends on the
kind of fish that they hunt. While mackerel or herring have a
lot of fat, squid have not much fat, therefore, to get the
energy required for their activities, dolphins have to eat more
squid than mackerel.
On average, a dolphin with a weigh of 200 Kg. to 250 Kg will
eat between 10 Kg to 25 Kg of fish every day.
Usually to hunt fish, some species of dolphins use a method
called herding which is performed by a pod of dolphins where
some of them surround a school of fish to compress them as much
as possible, while some others take turns to dive through the
compacted school of fish and feed.
Other usual method is corralling where fish is chased to
shallow waters where they cannot escape.
Some species catch larger fish by hitting them with their
tails to stun them.
Therefore the question about what do dolphins eat, has to be
answered for every species in particular.
In this video you can watch a pod of dolphins working
together to feed themselves and using the technique
called herding to catch the fish as they surround the
school of fish and then some of them take turns to eat.
In the video you can even watch fish jumping out of the water
trying to scape and then they are catched as they
jump.
The Chilean dolphin, also known as black dolphin is a small
dolphin which lives off the coast of Chile and it is the only
place in the world where it can be found.
They eat small species of fish, cephalopods and
crustaceans.
As they are small, they eat small species of fishes.
What do Bottlenose dolphins eat?
Bottlenose dolphins eat mainly small fish and occasionally
squid, crabs, shrimp, among other small animals.
They have teeht but they do not chew their food.
Like many other species bottlenose Dolphins work together to
hunt fish more efficiently. Usually a group of dolphins
surround the school to keep the fish together and then they
take turns to eat.
As you can see in the video above, sometime bottlenose
dolphins use their tails to stun fish and then catch them
easily.