There should be jokes about dolphins in both Chinese and English.

One day, two whales were chatting in the sea. "It's not easy to make money now!" "I heard that people like cleanliness." "Let's try to do it!" "OK ... how much can we get for cleaning the streets?" One day, two whales were chatting in the sea. "It's not easy to make money now!" "I heard that people should be clean." "Let's try!" "Well ... how much can I get for sweeping the road?" Just turn whales into dolphins.