 The great northern tilefish has a unique burrowing behavior and habitat preference . In addition to their unique habitat choice , golden tilefish display sexually dimorphic growth with males growing to larger sizes and are behaviorally dominant over their female counterparts . The great northern tilefish is not a migratory fish ; it stays in one local area that fits its needs all year round . It is theorized that seasonal migration may occur with changes in the water temperatures around the Nantucket Shoals and Georges Bank during the winter or spring , but this theory has no definitive evidence . A competing theory suggests that the tilefish may instead reduce its activity or hibernate within its burrows during times of cold temperatures . 
