read the fish limit and size limit and fishing regulations.
https://www.ontario.ca/document/ontario-fishing-regulations-summary
https://www.ontario.ca/document/ontario-fishing-regulations-summary/fisheries-management-zone-16
Zone-wide seasons and limits
Zone-wide seasons and limits apply to all waters in the Zone except for the specific waters and species listed in the species exceptions, waterbody exceptions and fish sanctuaries.
Aggregate limits for trout and salmon (including splake)
Limits: S-5 and C-2; total daily catch and possession limit for all trout and salmon species combined
Atlantic salmon
Season: fourth Saturday in April to September 30
Limits: S-0 and C-0
Brook trout
Season: fourth Saturday in April to September 30
Limits: S-5 and C-2
Brown trout
Season: fourth Saturday in April to September 30
Limits: S-5 and C-2
Channel catfish
Season: open all year
Limits: S-12 and C-6
Crappie
Season: open all year
Limits: S-30 and C-10
Lake sturgeon
Season: closed all year
Lake trout
Season: January 1 to September 30
Limits: S-2 and C-1
Lake whitefish
Season: open all year
Limits: S-12 and C-6
Largemouth and smallmouth bass combined
Season: fourth Saturday in June to November 30
Limits: S-6 and C-2
Muskellunge
Season: first Saturday in June to December 15
Limits: S-1; must be greater than 91 centimetres, and C-0
Northern pike
Season: January 1 to March 31 and second Saturday in May to December 31
Limits: S-6 and C-2
Pacific salmon
Season: fourth Saturday in April to September 30
Limits: S-5 and C-2
Rainbow trout
Season: fourth Saturday in April to September 30
Limits: S-2 and C-1
Splake
Season: open all year
Limits: S-5 and C-2
Sunfish
Season: open all year
Limits: S-50 and C-25
Walleye and sauger combined
Season: January 1 to March 15 and second Saturday in May to December 31
Limits: S-4 and C-2; not more than one greater than 46 centimetres
Yellow perch
Season: open all year
Limits: S-50 and C-25
https://fishingworld.ca/pages/ontario-fish-species