Marine veterinarians diagnose and treat marine mammals, sea turtles, fish, and aquatic wildlife in rehabilitation centres, aquariums, and field settings. They oversee water-quality monitoring, disease prevention, nutrition planning, rescue operations, and aquatic animal welfare. The role requires strong understanding of marine ecosystems, diving ability, and specialised diagnostic skills. With increased threats such as plastic pollution, climate change, and emerging aquatic diseases, marine veterinarians are critical for conservation and sustainable aquaculture. They collaborate with marine biologists, conservation groups, and fisheries agencies.