The Hudson River is rolling along — literally, on wheels as scientists introduce a new way to teach park visitors about about ecology.

The Hudson River Park Trust introduces its Roving River bicycle, featuring a built-in fish tank.

Armed with facts about wildlife, marine biologists are pedaling around educating the public about thriving ecosystems in the Hudson River.

Experts say despite what many believe, the river is cleaner than ever.

"Water quality has improved, especially since the Clean Water Act back in the 1970s," said Tina Walsh director of education outreach for the Hudson River Park Trust. "And really an MVP we're seeing start to make a comeback is the oyster in the Hudson River. We're part of efforts to restore oysters, and we're taking oysters and wrapping them around piles and supports of piers in the park to see if that helps oysters find a place to live."

And if you're really into the study of fish, there's the Marine Science Festvial coming up on September 16.

To learn more, visit the trust's website.