Research is being conducted on the impact of environmental stressors on fish growth and development, with studies examining various factors such as probiotics, dietary supplements, and exposure to pollutants. The effects of these stressors on fish health and resilience are being investigated, with potential implications for aquaculture and planetary health. Different species of fish, including Nile tilapia and Atlantic salmon, are being studied to better understand the endocrine control of growth and the stress response in fish.