Yes, despite its industrial reputation, the East River in New York City is home to a surprisingly diverse array of fish species. Because the "river" is actually a saltwater tidal strait connecting the Upper New York Bay to the Long Island Sound, it hosts both resident and migratory species. Common fish found in these waters include Striped Bass, Bluefish, Summer Flounder (Fluke), and Winter Flounder. You may also encounter Atlantic Menhaden, American Eels, and even the occasional Seahorse or small shark. In recent years, water quality has improved significantly due to stricter environmental regulations, leading to a resurgence in the local ecosystem. However, health officials still issue warnings regarding the consumption of fish caught in the East River due to lingering toxins like PCBs and mercury found in the sediment. While catch-and-release fishing is a popular hobby along the piers of Long Island City and Brooklyn, the river's inhabitants are a testament to the resilience of urban nature, thriving in one of the busiest maritime corridors in the world.