Integrated aquatic husbandry systems have the advantage that nutrients that enter the system through the feeding of fish and their excreta can be used by organisms from other trophic levels to primary producers such as plants. Approaches such as integrated multitrophic aquaculture or aquaponics create an ecological and economic added value. An important aspect of sustainable aquaculture production is also the optimal offspring of spotted fish, which are often recruited from wild stocks, especially in new aquaculture species. Here, molecular and cellular biotechnologies, such as e.g. cryopreservation, can be used specifically for reproduction and rearing.