- Y-40 The Deep Joy
- Yaara Giri
- Yaene
- Yallingup Beach
- Yallow Stone Reef
- Yamada Coral farm
- Yamada Point
- Yamada Sunachi
- Yamamoto Special
- Yanui Beach
- Yapak
- Yatush Wreck Eilat יתוש אילת
- Yealat Wreck, Eilat יעלת
- Yehyukang 椰油港
- Yelken Kaya
- Yellow Stone
- Yellow Sub
- Yellow Submarine
- Yellowstone Lake Lodge
- Yenbuba Jetty
- Yenkoranu Jetty
- Yeyiu Fault 椰油斷層
- Yilanci Burnu
- 燕子岩 Yin Tsz Ngam
- Yixian Tian 一線天
- Yixiantian 一線天
- Yo-257 & San Pedro
- Yogn 82
- Yokohishi
- Yokoshima 2 gōchi
- Yokoshima danso
- Yolanda House Reef
- Yonaguni Monument
- Yonara Channel
- Yonehara Reef
- Yong Hua Wreck
- Yongala Wreck
- York Shoal
- Yoron Island
- Yotsushima Jetty
- You and Me Giri
- You and Me Wall
- Yubanta
- Yucab Reef
- Yugawara Aqua Park
- Yunvyan 玉女岩
- Yunvyan Outer Reef 玉女岩外礁
