The first part of the course deal with legislations and regulations in animal experimentation and which types of experiments are under the Animal welfare act and the legislations and regulations which apply to the hold of live fish and decapods. The biological part of the course includes lectures on pain perception, stressors and stress responses, health and welfare, anaesthesia/immobilisation, acclimation, environmental needs and tagging methods. The course also encompasses seminars in which the various topics in the lectures, including ethical issues and considerations, are discussed. Seminars also include work with experimental design (including the three R's) of a given research topic, and compilation of an application to the Norwegian animal research authority on the same research topic. Finally the course includes a one day excursion to the research station in Kårvik for practical demonstrations of experiment preparation, fish handling, blood sampling, anesthesia etc.