Fish and meat may not be cooked or eaten together. However, unlike milk and meat, fish and meat may be eaten at the same meal as separate courses. Silverware and plates which have been used for fish may only be used for meat after they have been washed. Between the fish and meat courses, one should eat something that does not stick to the palate and take a drink (preferably other than water). Some people also rinse their hands slightly between courses.

Customs vary regarding the use of fish and dairy. Most communities permit the combination of fish and butter. In certain communities, fish is not combined with milk or cheese. Fish and dairy may be served at the same meal with separate plates and silverware.