The diver named Hiroyuki Arakawa is a supervisor of Marine life. He always meets some marine animals when he works under water. What's more, he kept friendship longer than 25 years with a local fish called Yoriko.
According to scientific data, fish can identify human faces. The scientist once showed two figures in front of fish in order to train their descrimination. 86% fish can pick up the face they are familiar with. Enough evidence has proven the profound friendship between Hiroyuki Arakawa and Yoriko.
Yoriko shows its sweet smile.