Here is what is says from a MNR muskie mangement documnet.
Catch and Possession Limits
Historically, the daily catch limit for muskellunge was two fish. The catch limit was reduced to
one (1) fish with a maximum of two (2) fish in possession based on recommendations from the
1985 regulatory review. There is currently a catch and possession limit of zero (0) for anglers
holding a conservation licence, although they are legally allowed to angle for muskellunge, but
they must immediately release any fish that they catch. Most species of fish in Ontario have the
same catch and possession limits. This regulatio