Gray dwarf hamster in green cage

I lost my gray dwarf hamster, Niko, yesterday around 3pm. He lives in a small green cage with a pink water bottle and a tiny blue exercise ball. I was at the South Coast Boardwalk near Oceanview Café on Main Street when a loose latch let him slip out. Niko is about the size of a ping-pong ball, with a white blaze on his forehead and a tiny black dot on his left ear; he’s quick and skittish. This little guy has sentimental value to me—he was a gift from my sister, and I’d really appreciate getting him back.