Most light-to-medium colored beers are pretty translucent, and light is able to shine through easily. By contrast, a hazy IPA has a cloudy appearance when poured into a glass.
Hazy IPAs, also commonly known as New England or Northeast IPAs (NEIPAs), get their less-translucent appearance from using high protein grains in the brewing process.
NEIPAs, East Coast IPAs, or hazy IPAs use a significant amount of high-protein grains like oats and wheat as the malt, which leads to a hazy appearance.
This will result in a richer mouthfeel that is a little bit heavier on the palate. In terms of flavor, they're usually fruity and juicy, with well-balanced bitterness.
All IPAs have some degree of bitterness to them, but the fuller mouthfeel and bold fruity flavors tend to make NEIPAs taste a little more balanced and less aggressive.