Mean size at capture has decreased throughout the species range. 100 m. Migratory movement is driven by spawning and feeding. Spawning occurs offshore in early spring in North Carolina and lasts till late September in northern latitudes.
Eggs are buoyant and float in huge gelatinous masses until hatching.
Monkfish are bottom fish that have a modified first dorsal spine which is used to attract prey. Prey items are numerous, some of which include spiny dogfish, skates, weakfish, tautog, flounders and sea birds among others.