How many fish fit in a subway car?

323 fish. that's right, every sudway car will host 323 fish.

I was reading this article about a decision to dump 600 New York city subway cars along the New Jersey shore as artificial reefs. According to that article, subway cars were used as artificial reefs in South Carolina and attracted lots of marine life within 10 years. A 3-year study by the state Division of Fish and Wildlife showed that each subway car hosted 323 reef fish.