Laying the reefs
![A total of 750 artificial Triton reefs, made of steel slugs, by-products of steelmaking, are transported on a ship in the waters near Ulleung Island on Thursday. Posco laid the reefs near the island ahead of Korea's Ocean Day on May 31. [POSCO]](https://koreajoongangdaily.joins.com/data/photo/2020/05/28/d43aeaab-593d-4ca1-b501-f08aeb9f0948.jpg)
A total of 750 artificial Triton reefs, made of steel slugs, by-products of steelmaking, are transported on a ship in the waters near Ulleung Island on Thursday. Posco laid the reefs near the island ahead of Korea's Ocean Day on May 31. [POSCO]
with the Korea JoongAng Daily
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