Benthoic animals are:

Options

A. Deep in sea
B. Floating
C. Submerged
D. Active swimmers.

Answer

**Step-by-Step Solution:**

1. **Definition of Benthoic Animals**: Benthoic animals are organisms that inhabit the sea floor. They are part of the benthic zone, which is the ecological region at the lowest level of a body of water.

2. **Characteristics**: These animals vary in size, with some being as small as 1 mm in diameter. They are often segmented and can be referred to as polychaete worms, which are a dominant group among benthoic organisms.

3. **Habitat**: Benthoic animals are typically found deep in the sea, where they thrive in the ocean floor environment.

4. **Feeding Habits**: They are known as consumers, primarily feeding on plankton and other organic materials that settle on the sea floor.

5. **Options Analysis**:
- **Deep in Sea**: This option is correct as benthoic animals inhabit the sea floor.
- **Floating**: This option is incorrect because benthoic animals do not float on the surface of the water.
- **Submerged**: This option is also incorrect as it implies being inside the water but not necessarily at the sea floor.
- **Active Swimmers**: This option is incorrect since benthoic animals are not active swimmers; they are primarily sedentary or move along the sea floor.

6. **Conclusion**: The correct answer to the question "Benthoic animals are:" is that they are found "deep in the sea."