The adult zebrafish as polyhedric model for skeletal studies.

In the last decade, several examples have been produced by scientific literature about zebrafish as a model to study human bone diseases. In fish, bone turnover, reparation and remodeling of the adult bone tissue cannot be studied in embryonic or juvenile stages. In addition, fins and scales represent unique anatomical features useful to study adult bone metabolism and diseases. For these reasons, the adult zebrafish represents an innovative and readily available resource for studying the bone metabolism at cellular and molecular level. Although the adult fish is less used than the embryo, several applications have been found in the last years with the production of innovative pathological models in adult zebrafish, helpful to understand the mechanisms of bone physiopathology. The use of mutants, regenerating organs, transgenic fish and scales have increased the power of this model in the last years.