General Regulations - Mettawee River
| Species | Minimum Length | Daily Limit | Legal Methods | Open Seasons for Harvest |
| American Shad | NA | 0 | Catch and Release Open-water fishing | All Year |
| Anadromous Atlantic Salmon | NA | 0 | None | No open season |
| Bowfin, Redhorse, Gar | NA | No more than 5 of any one species | Open-water fishing | All Year |
| Brook Trout, Brown Trout, Rainbow Trout | 10” to 16” protected slot (all fish 10” to 16” must be released) | Total of Brook + Brown + Rainbow = no more than 2 provided only 1 is over 16" | Open-water fishing | 2nd Sat in April to Oct. 31 |
| Carp, Suckers (Longnose and White) , Cull fish | NA | No Limit | Open-water fishing | All Year |
| Panfish - Bluegill, Bullhead, Black and White Crappie, Pumpkinseed, Rockbass, Yellow Perch | Crappie 8", No Minimum Length on other species | 50 fish total, no more than 25 of which can be Black and White Crappie | Open-water fishing, Ice fishing | All Year |
| Lake Sturgeon | NA | 0 | No fishing | No open season |
| Lake trout and Landlocked Atlantic salmon | 18" Lake trout, 17" Landlocked Atlantic Salmon | Total of lake trout + landlocked salmon = no more than 2 | Open-water fishing | 2nd Sat in April to Oct. 31 |
| Largemouth and Smallmouth Bass | 10" | Total of largemouth + smallmouth = no more than 5 | Open-water fishing, Ice fishing | 2nd Sat in June to March 15 |
| Muskellunge | NA | 0 | Catch and release with artifical lures and flies only | All Year |
| Northern Pike | 20" | 5 | Open-water fishing, Ice fishing | All Year |
| Rainbow Smelt | None | No Limit | Open-water fishing, Ice fishing | All Year |
| Sauger | NA | 0 | None | No open season |
| Walleye | 18" | 3 | Open-water fishing, Ice fishing | 1st Sat in May to March 15 |
| White Perch | NA | No Limit | Open-water fishing, Ice fishing | All Year |
| All Other Species | None | No Limit | Open-water fishing, Ice fishing | All Year |
| Chain Pickerel | None | No Limit | Open-water fishing, Ice fishing | All Year |