Section: Reading

19) View Additional Information

By using the phrase "saber-toothed" to characterize some of the fishes that live in the deepest waters, the author is suggesting that the fishes:

1. are still at an early stage of evolution.
2. appear frightening to behold.
3. are ferocious food - gatherers.
4. are soon likely to beome extinct.

The ferocity of the creatures is being emphasized. The other choices may merely call to mind the extinct saber-toothed tiger.