Osmoconformers and osmoregulators

Explanation

### Step-by-Step Solution:

1. **Definition of Osmoconformers**:
- Osmoconformers are aquatic organisms that maintain an internal osmolarity that is equal to the osmolarity of their external environment. This means that their body fluids are isotonic to the surrounding water.

2. **Mechanism of Osmoconformers**:
- These organisms can achieve this matching of osmolarity either through passive means (diffusion) or active means (using energy). They do not expend much energy to regulate their internal environment since it is aligned with the external conditions.

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