How are fishes helpful in controlling disease like malaria?

Explanation

**Step-by-Step Solution:**

1. **Introduction to the Role of Fishes:**
Fishes play a significant role in controlling certain diseases, particularly vector-borne diseases like malaria and dengue.

2. **Understanding the Vector:**
The primary vectors for malaria are female mosquitoes, which lay eggs that develop into larvae and pupae in stagnant water.

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