Term used for rearing of fish on a large scale is _________.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the term used to describe the large-scale rearing of fish. This indicates a focus on aquaculture practices.

2. **Identifying the Process**: The process of rearing fish involves cultivating them in a controlled environment. This includes the release of small fish or eggs into a suitable habitat where they can grow.

3. **Recognizing the Term**: The specific term used for this practice is "pisciculture." Pisciculture refers to the cultivation of fish in freshwater or saltwater environments.

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