甘泉島

甘泉島（中国語名）又はロバート島（英語: Robert Island、ベトナム語：Đảo Hữu Nhật / .mw-parser-output .vi-nom{font-family:"Nom Na Tong","Han-Nom Gothic","Han-Nom Ming","HAN NOM A","HAN NOM B","TH-Khaai-TP0","TH-Khaai-TP2","TH-Khaai-PP0","TH-Khaai-PP2","TH-Sung-PP0","TH-Ming-JP0","TH-Ming-JP2","TH-Sung-PP2","TH-Sung-TP0","TH-Sung-TP2","TH-Sy-P0","TH-Sy-P2","Ming-Lt-HKSCS-UNI-H","Ming-Lt-HKSCS-ExtB","FZKaiT-Extended","FZKaiT-Extended(SIP)","FZKaiS-Extended","FZKaiS-Extended(SIP)","Sun-ExtA","Sun-ExtB","MingLiU","MingLiU-ExtB","MingLiU_HKSCS","MingLiU_HKSCS-ExtB","SimSun","SimSun-ExtB",sans-serif}.mw-parser-output .vi-nom .ext{font-family:"Han-Nom Gothic","Han-Nom Ming","Han-Nom Minh","TH-Khaai-TP2","TH-Khaai-PP2","TH-Ming-JP2","TH-Sung-PP2","TH-Sung-TP2","TH-Sy-P0","TH-Sy-P2","Sun-ExtB","MingLiU HKSCS-ExtB","Ming-Lt-HKSCS-ExtB","HanaMinB","Han-Nom Kai",sans-serif}島有日）は、西沙諸島（パラセル諸島）南西部のクレスセント諸島（英語: Crescent Group、中国語: 永楽環礁）の西部に位置する島の一つである。羚羊礁から南約半海里、珊瑚島から北2海里離れている。