yosakoi! any japanese here can tell me the meaning of this dance?

"Yosakoi" pronounced "yooz a koi" is an interpretive traditional east-Asian dance dedicated to nature and fish, predominantly one specific type of koi. There are over ten billion types of these dances, each dedicated to a different type of fish. You are considered literate if you can memorize roughly 20.000 of them. Be sure you do so, as you will not be allowed into Japan unless you can pass spontaneous pop quizzes about them while you are there. Quizzes about interpretive dances are given to tourists randomly in their daily visitation routines, and they can expect to walk unknowingly into holes, be stalked by gangs dressed as Count Chocula, and any other sort of disorienting elements in order to be qualified as an outsider.