Name some primary consumers of a pond ecosystem.

Explanation

**Step-by-Step Solution:**

1. **Understanding Primary Consumers**: Primary consumers are organisms that primarily feed on producers (plants and phytoplankton) in an ecosystem. In a pond ecosystem, these are typically herbivores that consume plant material or algae.

2. **Identifying Producers in a Pond**: In a pond ecosystem, the primary producers are mainly aquatic plants and phytoplankton. These organisms convert sunlight into energy through photosynthesis.

3. **Listing Primary Consumers**:
- **Zooplankton**: These are small, often microscopic animals that drift in water and feed on phytoplankton. They are a crucial part of the aquatic food web.
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