Fish
Muskellunge
Esox masquinongy · also called muskie, musky, the fish of 10,000 casts
The muskellunge is the top of the food chain in the lakes it lives in — the biggest pike, a metre-plus ambush predator that eats other pike, ducklings, and muskrats. It is also proverbially the hardest freshwater fish in North America to catch, which is most of its appeal.
Overview
Esox masquinongy lives in large clear lakes and big rivers of the Great Lakes region and the upper Mississippi and St Lawrence basins. It is commonly 70–120 cm and can exceed 1.4 m and 20 kg, making it the largest member of the pike family. It eats large fish and whatever else swims within reach.
Muskie or pike
The quick check is the pattern: a muskie has dark marks on a light background, the reverse of the northern pike’s light spots on dark. Muskies also have more jaw pores, pointier tail lobes, and a half-scaled cheek. The tiger muskellunge is the sterile pike–muskie hybrid, widely stocked.
The fish of 10,000 casts
Muskellunge live at very low density, feed in short windows, and get warier once caught. Serious anglers may fish for weeks between fish and use the figure-eight — sweeping the lure beside the boat — to trigger a following muskie.
Status
Least Concern but naturally scarce and heavily managed, with metre-plus minimum sizes and a strong catch-and-release ethic, because females don’t spawn until 5–7 years old.
Muskellunge: common questions
What is the difference between a muskie and a northern pike?
They are close relatives in the same genus, Esox, but several features separate them. The colour pattern is reversed — a northern pike has light, bean-shaped spots on a dark green flank, while a muskellunge has dark bars, spots, or a plain flank on a lighter background. Under the jaw, a pike has five sensory pores on each side and a muskie has six to nine. The muskie's tail lobes come to sharper points, its fins often carry spots, and it has scales on only the top half of its cheek and gill cover, whereas the pike's cheek is fully scaled. Muskies also grow larger on average and are far less common.
Why is it called the fish of 10,000 casts?
Because catching one takes a level of effort that borders on the absurd. Muskellunge are big, wary, and thinly spread, they often feed for only short windows, and a hooked or previously caught fish becomes even harder to fool. Dedicated muskie anglers may fish for days or weeks between fish, cast heavy lures thousands of times a trip, and measure a good year in single digits. The 10,000 figure is folklore rather than a real average, but it captures the reality that the muskie is a trophy hunter's fish, pursued for the rarity of the encounter as much as the fight.
Are muskellunge dangerous to swimmers?
Not meaningfully. There are occasional reports of a large muskie or pike biting the hand, foot, or leg of a person in warm shallow water, usually a case of the fish mistaking a pale moving limb for prey or defending a spot, and the result is a set of cuts from the teeth, sometimes needing stitches, rather than a serious attack. Such incidents are rare. The real hazard is to the angler handling the fish in the boat, where the teeth, the thrashing, and the treble hooks can all cause nasty injuries, which is why muskie anglers carry long pliers, jaw spreaders, and heavy gloves.
How big can a muskellunge get, and what is the record?
A muskie of a metre is a good fish and one of 1.3 metres and 15 kilograms is a genuine trophy. The all-tackle world record is contested — a fish of about 31.7 kilograms from the Chippewa Flowage in Wisconsin in 1949 and a similar one from the St Lawrence River in 1957 have both been challenged by later analysis of the photographs, and some record bodies recognise a smaller fish. What is not in doubt is that the muskellunge, along with its relative the northern pike, is among the largest fish an angler can catch in North American fresh water.