EDIT: Added a temporal English translation made by me. I hope it helps out until a skilled someone decides to translate it properly :p
Note: A chauliodus sloani is a very ugly fish.
"It won't come true, you won't make it
no advancing, no rescue
It won't come true, there's no way back!
you won't make it - SINK!!"
"The light of the deep sea"
Original：2015春イベント第5、6海域ボス戦闘 (Spring Event 2015 - E5 & E6 boss battle )
「艦隊これくしょん～艦これ～」
Vocals：瑶山百霊
Lyrics：蒼羅杏
Arrangement：戦場ヶ原妖精 (composition also by LEMiao)
Circle：Yonder Voice | http://yondervoice.net/
Album：砕夢 | Comiket 88
Illustration：NEKO♨甲 | http://www.pixiv.net/member_illust.php?mode=medium&illust_id=51804930
I don't own anything in the video, including the audio and picture. The credits go to the respective owners. This video is purely fan-made and will not be used for profit or illegal sharing!