Animals which live on the floor of sea are called benthic.

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question states that animals which live on the floor of the sea are called benthic. We need to determine if this statement is true or false.

2. **Defining Benthic Zone**: The benthic zone refers to the ecological region at the lowest level of a body of water, including the sediment surface and some sub-surface layers. It is the area where organisms live on or in the sea floor.

3. **Identifying Benthic Animals**: Animals that inhabit the benthic zone are known as benthos. These include a variety of organisms such as mollusks, echinoderms, sea anemones, corals, sponges, crabs, and lobsters. These organisms can be either free-moving or sessile (attached to the sea floor).

4. **Relation to Other Zones**: In a water body, there are different zones:
- **Littoral Zone**: This is the area near the shore where sunlight penetrates, allowing for plant growth.
- **Limnetic Zone**: This is the open water area where light does not reach the bottom.
- **Benthic Zone**: This is the bottom layer where light is absent, and various organisms live.

5. **Conclusion**: Since the definition of the benthic zone aligns with the statement that animals living on the floor of the sea are called benthic, we can conclude that the statement is true.

### Final Answer:
The statement "Animals which live on the floor of sea are called benthic" is **True**.

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