The way to tame dolphins in my world is this: first, players should find a dolphin in my world game, then feed the dolphins with small fish, and then catch the dolphins' fins to tame them.

To domesticate dolphins, we must first get the dolphin's food-fish. Fish can be obtained by fishing. After I catch a fish, I will put it in my backpack, get close to the dolphins and throw the fish at them. After a while, dolphins will eat fish. If the fish disappears, the feeding is successful.

The second step is to knock off the spaced squares, let the seawater in, and smooth the water surface with a bucket instead of running water. In many ways, it's just a few buckets of water.

Dolphins can't ride directly, but they can ride dolphins in other ways. After entering the game, turn on the host. Just enter /summopolphin ~ ~ 1 ~ {Passenger: [{ID: "Minecart"}]} code.

Reduce a large area of water to only one river, then dig a canal leading home, and finally drive the dolphins forward and keep them in captivity.