The big fish composed of small black fish and small red fish continue to swim around on the bottom of the sea. According to the story of the picture book "Little Black Fish", we learned that the big fish composed of little black fish and little red fish continued to swim around on the bottom of the sea. The small fish were finally able to defeat the tuna and other big fish, relying not only on themselves It is the power of everyone, but the result of everyone’s joint efforts. This tells the children that some difficulties can be solved by themselves, but some require the strength of everyone.