Definetly a nocturnal fish... They feed off the bottom... In the day, any piece of fish laid on the bottom will catch burbot.. At night which is prime time for them, we fish anything glow tipped with minnow or any other piece of fish. rubber tubes can be great too.. We jig for them at night and still place tip ups on the bottom to help our chances... I've found best bite to be just before dusk till about 10 oclock but you will get them all night if you want to hang in there... Muddy bottoms are best around these parts for sure they spawn under the ice too which is pretty cool in very shallow waters...
Definetly a great eating fish!!
good luck