When do dolphins hunt its food?

Yes, They use a system called echolocation. In which they let out a series of clicks, when the sound waves hit an object, they bounce back telling the dolphin exactly were it is and what size it is. Using this dolphins can locate fish.

Another answer would be: yes,

Another answer

Dolphins catch their food mainly using two clever techniques which require a highly coordinated team job.

Herding

The first one is called herding and it is performed by a group of dolphins who surround a school of fish to pack them as tightly as possible.

When this is done, dolphins take turns to go through the school and feed one at the time while the others keep the school of fish as packed as possible.

This guarantees that each pass through the school of fish, will be very efficient and the largest amount possible of fish will be taken.

Corralling

The other technique for feeding used by dolphins is called corralling.

This is used when the school of fish is chased by a group of dolphins to shallow waters where they are trapped between the shore and the group of dolphins who push them there. After this, the fishes are easily caught when dolphins take turns to eat.