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| reef; riff | |||
| 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 | |||
| Riff: 13 phrases in 9 subjects |
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| Earth sciences | 1 |
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