Fish Physiology and Biochemistry is an international journal publishing original research papers in all aspects of the physiology and biochemistry of fishes. Papers dealing with experimental work in the following areas will be given preference but other topics will be given consideration: Biochemistry of organisms organs tissues and cells. Structure of organs tissues cells and organelles related to their function. Nutritional osmotic ionic respiratory and excretory homeostasis. Nerve and muscle physiology. Endocrinology. Reproductive physiology. Energetics. Biochemical and physiological effects of toxicants. Molecular biology and biotechnology. Categories of articles include full papers brief communications rapid communications unsolicited and invited reviews and editorial comments and announcements.