Ballast has 2 syllables and the stress is on the first syllable.
| # | Sentence | |
|---|---|---|
| 1. | An invasive species can be introduced to a new area via the ballast water of oceangoing ships, intentional and accidental releases of aquaculture species, aquarium specimens or bait, and other means. | |
| 2. | Invasive species can be introduced to an area by ship ballast water, accidental release, and most often, by people. | |
| 3. | Zebra mussels arrived in the mid-1980’s in ship ballast water from the Black and Caspian Sea region, and have become a major threat to wildlife, navigation, and boating. |