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| reef; riff | |||
| shelf | |||
| reef A line of rocks in the tidal zone of a coast, submerged at high water but partly uncovered at low water | |||
| skerry | |||
| bar | |||
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| shelf under water | |||
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| reefs | |||
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Riff : 13 短语, 9 学科 |
| 一般 | 2 |
| 信息技术 | 2 |
| 养鱼（养鱼） | 1 |
| 农业 | 2 |
| 地球科学 | 1 |
| 水肺潜水 | 1 |
| 法律 | 1 |
| 自然资源和野生动物保护 | 2 |
| 非正式的 | 1 |