Here is the muskie drawing part of the sign, you will be looking for 6 to 9 pores per side on a muskie with an overall appearance of silvery/gray colour with vertical stripes and other variations should you catch a tiger muskie that is a breed of pike/muskie in one.
Some other identifiers are that muskie physically look stronger then pike, harder outside gill plates, stronger heavier overall body structure as well. Think of it like comparing a regular shark species to a great white, structure is similar but the species on the top of the food chain is much stronger and built better to be at the top of the food chain.
The AMFisH guy…