New Hampshire state waters, out to 3 miles
NH F&G 2026 · checked · the official rulebook is the final word
Past 3 miles: federal waters Different rule
No retention in federal or Massachusetts waters — release immediately.
NOAA GARFO 2026 · checked 2026-09-20
Often mistaken for
Winter flounderThick, right-facing. Tell them apart
Summer flounderBig mouth, eye-spots. Tell them apartKeep the wrong fish and its rule applies.
How to tell it
So thin it's translucent held to the sun; nearly round, left-facing, finely freckled. More on the windowpane flounder page: every state’s rule, the records, and how anglers catch it.
Windowpane flounder in other states5 rulebooks
Questions anglers ask2
Can you keep windowpane flounder in New Hampshire?
No. Harvest is prohibited in New Hampshire. Release it in the water where you can.
How current is this New Hampshire windowpane flounder rule?
Source: NH F&G 2026, last checked Sep 10, 2026. A watchman re-reads the agency's pages nightly. Rules change mid-season by proclamation; the official rulebook is the final word.
In the appPoint the camera at a windowpane flounder in New Hampshire and this rule is on the screen before you take the picture. No signal needed.
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