September 4, 2014 Visiting at a tropical fish shop On September 4th, I went to a tropical fish shop called Tropiland in Sagamihara. I researched about what kind of fishes this shop sells. During the research, I was using the table below showing the foreign fish species to compare.
出典：タマゾン川と呼ばれる川
（多摩川～外来魚に汚染された川）
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I saw Silver arowana（Osteoglossum bicirrhosum）which lived in North America, Angel fish, and many types of neon tetra (Paracheirodon innesi) in this shop. There is the notice that shows the ranking of neon tetra. I heard that Neon tetra was a popular ornamental fish among customers. So I imagined that a lot of Neon tetra would be released into rivers.
Then, I saw many kinds of guppies, too. Guppy is also popular among customers. 
Finally, I asked a shop keeper a couple of questions. He replied “We don’t know anything about the fish right after the customers purchase them. Customers should be responsible for their own fishes.” I realized that it was very important to have a sense of responsibility for their fishes once they decide to own one.
