Aquaculture engineering is when people create environments for fish to live and grow in.
Think of it like building a big fish house that can hold a lot of fish. The engineers need to make sure the fish house has enough water for the fish to swim in, the right temperature for the fish to be comfortable, and clean water for them to breathe.
The engineers also need to figure out how to feed the fish while they live in the fish house. Sometimes they will use machines to add food to the water.
The engineers will also make sure the fish house is safe for the fish, like making sure there are no predators or harmful chemicals around.
Overall, aquaculture engineering is about creating a safe and healthy environment for fish to live and grow in, so that we can have more fish to eat and enjoy.