うなぎは将来しょうらいいなくなる心配しんぱいがあります
水産庁すいさんちょうで研究けんきゅうの報告ほうこく会かいがありました
水産庁すいさんちょうによると、うなぎを卵たまごから育そだてると、普通ふつうの養殖ようしょくの3倍ばいぐらいお金かねがかかります
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