This is official site of Black Water Dive® produced by photographer Ryo Minemizu. Black Water Dive® is a kind of night diving. We are setting up underwater lights of high-color rendering on the sea bottom of night that while considering tides, times, places. The creature which appears is mainly juveniles and larvae. All is fascinating, and it's not to be seen at daytime or regular night diving. It will be your first experience. This site will introduce the state of the event and the creatures seen and also future of BWD schedules. *"BWD"stands for Black Water Dive®.*Black Water Dive® is a registered trademark of Ryo Minemizu.


峯水 亮 写真展 Jewels in the night sea 神秘のプランクトン

峯水 亮 写真展 Jewels in the night sea 神秘のプランクトン





所在地: 〒 104-0061 東京都中央区銀座3-9-7トレランス銀座ビルディング1F


  • 都営地下鉄 東銀座A7、A8出口より徒歩2分
  • 東銀座駅(日比谷線)A2出口より徒歩3分
  • 銀座駅(銀座線・丸ノ内線・日比谷線)A12出口より徒歩3分
  • ※ 駐車場はございませんので、公共交通機関をご利用ください。

開館時間: 10時30分~18時30分(写真展最終日 15時まで)


電話: 03-3542-1860





所在地: 〒460-0003 愛知県名古屋市中区 錦 1-11-11 名古屋インターシティ 1F


  • 地下鉄東山線・鶴舞線 伏見駅10番出口すぐ

開館時間: 10時~18時(写真展最終日 15時まで)


電話: 052-209-6180
※ 電話受付 月~金・10時~18時





所在地: 〒530-0005 大阪市北区中之島3-2-4 中之島フェスティバルタワー・ウエスト1F


  • 地下鉄四つ橋線「肥後橋」駅、京阪中之島線「渡辺橋」駅直結
  • 地下鉄御堂筋線「淀屋橋」駅徒歩5分
  • JR東西線「北新地」駅徒歩8分
  • JR「大阪」駅徒歩11分

開館時間: 10時~18時(写真展最終日 15時まで)


電話: 06-7739-2125
※ 電話受付 月~金・10時~18時



Larval-fish of Manefish - ヤエギスの稚魚

This is larval-fish of Caristius macropus (Bellotti, 1903). Body length was SL20 mm. Larval-fish is known to be with jellyfishes of Siphonophorae such as Agalma okenii, Apolemia uvaria and Rosacea cymbiformis. This time it was with A. okenii. Since it departs from jellyfish when diver approaching too much, dependency on the host seems to be low.  Adult is bathypelagic. It's habitat depth range 250 - 1420 m. Larvae habitat from surface. C. macropus has lateral line, but closely related species of Paracaristius nudarcus has not lateral line. The width of the eyes and the maxilla is narrow. Dorsal soft rays:33-35, Anal soft rays:21-23.

Larval-fish of Manefish 
Larval-fish of Manefish


Distribution Map(

Nakabo, T. (ed.), 2013. Fishes of Japan with pictorial keys to the species, third edition. Tokai University Press, Kanagawa, Japan. Pp, 2428. (3-Volume Set) (in Japanese).

Okiyama M. (ed), 2014. An Atlas of Early Stage Fishes in Japan Second Edition. Tokai University Press, Kanagawa, Japan. :Pp,1912. (in Japanese).

Okamoto, M., and D. E. Stevenson. 2015. Records of two manefishes, Platyberyx andriashevi and P. rhyton(Teleostei: Perciformes: Caristiidae), from off the Ogasawara Islands, Japan. Species Diversity 20:13-17

Okamoto, M., D. E. Stevenson, and H. Motomura. 2014. First record of Paracaristius maderensis from the central North Pacific and a second specimen of Platyberyx rhyton (Perciformes: Caristiidae). Biogeography 16:23-29.

<Japanese explanation>
ヤエギスの稚魚。英名Manefishの"Mane"は"たてがみ"や"長い髪"を表します。撮影個体は体長SL20 mm。稚魚はヨウラククラゲ、ケムシクラゲ、アイオイクラゲのような管クラゲの仲間と一緒にいることが知られています。今回はヨウラククラゲと一緒にいました。 近づきすぎるとクラゲから離れるので、宿主への依存度は低いようです。成魚は深海浮遊性で、水深250〜1420 mに生息しています。稚魚は表層から生息しています。ヤエギスには側線がありますが、近縁のコクチヤエギス(Paracaristius nudarcus)には側線がありません。また、ヤエギスは眼と上顎がかなり接近していて、その幅が狭いのが特徴です。背鰭軟条数は33-35、臀鰭軟条数は21-23です。

Family Caristiidae Gill & Smith, 1905  ヤエギス科

Genus Caristius Gill & Smith, 1905 ヤエギス属
Caristius macropus (Bellotti, 1903)  ヤエギス D33-35; A21-23;

Genus Paracaristius Trunov, Kukuev & Parin, 2006 コクチヤエギス属
Paracaristius nudarcus Stevenson & Kenaley, 2011 コクチヤエギス D27-31; A17-20;
Paracaristius maderensis (Maul, 1949) マデイラコクチヤエギス D29-31; A18-19;

Genus Platyberyx Zugmayer, 1911 サンリクヤエギス属
Platyberyx andriashevi (Kukuev, Parin, & Trunov, 2012) イロジロヤエギス D31-35; A20-22;
Platyberyx rhyton Stevenson & Kenaley, 2013 サンリクヤエギス D30-31; A18;



Larval-fish of Spinyfin velifer-ヒメクサアジの稚魚

Larval-fish of Spinyfin velifer,ヒメクサアジの稚魚
Larval-fish of Spinyfin velifer
Spinyfin velifer is very rare fish. It inhabits continental slope and oceanic ridge at depths of 175 m to 220 m but little is known about detailed ecology. Although it is very rare, divers often find adult-fish in scuba diving. It is the larval-fish of that the Spinyfin velifer that I will introduce this time.

This larval-fish body length is SL11 mm. First six of the dorsal fin is stretched. The pectoral fins is large and long and dark pigment patches on at the tips of the pectoral fins.

I found it at day time drift dive. It was December 7, 2017. Location is Suruga Bay in Osezaki, Shizuoka Prefecture, Japan. The water depth was 2 meters below the surface. The sea temperature was 18 ℃.

Larval-fish of Spinyfin velifer,ヒメクサアジの稚魚
Black pigment concentrates on the head
Scientific name: Metavelifer multiradiatus (Regan, 1907)

Distribution Map(

Nakabo, T. (ed.), 2013. Fishes of Japan with pictorial keys to the species, third edition. Tokai University Press, Kanagawa, Pp, 2428. (3-Volume Set)  (in Japanese).

Okiyama M. (ed), 2014. An Atlas of Early Stage Fishes in Japan Second Edition Tokai University Press, Japan. :Pp,1912. (in Japanese).

<Japanese explanation>
ヒメクサアジ Metavelifer multiradiatus (アカマンボウ目 Lampridiformes,クサアジ科 Veliferidae) は世界でも非常にまれな魚です。 通常、175〜220mの深さで大陸斜面や海嶺に生息していますが、詳細な生態についてはほとんど知られていません。非常にまれではありますが、成魚はダイバーによってスキューバダイビングで見つかることがあります。今回紹介するのはそのヒメクサアジ の稚魚です。この稚魚の体長はSL11 mmです。 背鰭の最初の6つが伸びています。 胸鰭は大きくて長く、胸鰭の先端に濃い色の斑点があります。私は日中のドリフトダイビングでそれを見つけました。 2017年12月7日です。場所は静岡県大瀬崎,駿河湾,水深-2メートル, 海水温は18℃。


開催決定 沖縄本島ブラックウォーターダイブ® 2017年第3弾

Black Water Dive🄬 Okinawa Mainland 2017 Vol.3

Okinawa-mainland Black Water Dive🄬
24(Tuesday)-27(Friday) October
DiveShop: Dolphinkick
Staff: Naoki Shirakawa
Phone: 81+ 98-963-6640

DiveShop: ドルフィンキック
〒900-0012 沖縄県那覇市泊2-11-8-105
担当: 白川 直樹
店: 098-963-6640
携帯: 090-7114-9148



Day Dream which operates the best cruise boat RyomaI in the Republic Palau that also known as the sacred place of Micronesia. This is a joint project of Midnight Dive (MND)  by Day Dream and Black Water Dive ® (BWD) produced by Ryo Minemizu.


Cruises will be held on the following schedule.
Period:Oct,14(Sat)~21(Sat) 2017

Cruise schedule:

  • Oct,14(Sat)~21(Sat) 7 nights 8 days with 22 dives plan (1 week)
  • Oct,14(Sat)~17(thu) 3 nights 4 days with 8 dives plan
  • Oct,17(thu)~21(Sat) 4 nights 5 days with 12 dives plan
basic style is:Afternoon: One dive, Night: three dive

It's opportunity to encounter especial plankton. Everyone please participate!

Midnight Dive done at Day Dream Cruise's "Ryoma I" is the best.

  • Night diving at the drop off of open ocean is too far away from Koror city and it is difficult to hold.However, if you access from Ryoma I who is anchored in Rock Island, you can quickly get to the point!
  • Ryoma I's cabin is widespread and as clean as a hotel, and can be comfortably any time.
  • Meal is one of the important elements of the journey. it is a buffet style by Japanese chef and include dessert.It is safe even in the first Palau.
  • You can use it is freedom when you to receive three tanks at night. Please enjoy dive in the ocean of the night. It is possible to dive from the afternoon during the day (only applicant)
  • We spending 24 hours on the same ship, you can listen to our anytime during cruising if you have things that you do not know about living things and about the cameras.
  • This is special cruises becuse special staff familiar with this field and photographer Ryo Minemizu are also to participate. Please ask anything without restraint to us.
  • Scheduled to be held at a special point because Ryo participation special cruise.
  • You can also use Nitrox (free) tank. (EANx license can be acquired at locally)
  • Because the time to move to the point is short, you can take a warm shower as soon as you return from diving.

To this Midnight Dive Week, photographer Ryo Minemizu who won the Grand Prix at the 5th Nikkei National Geographic Photography Award he is on board, and it will be held jointly with Black Water Dive® hosted by Ryo. In search of unknown encounters, there is a chance to go to places that have not usually been held much.
Also, during the cruise, it will hold a special talk session by Mr. Akino (Day Dream CEO) × Mr. Ryo Minemizu in addition to Slide & Talk Show by Ryo. There is a chance to hear anything anytime during the period!

*You can ask Ryo anything about the creatures you saw or about the camera.

Cruise Fee & Overview
Participation offer・For inquiries To: DayDreamCruise

Sponsor:  AOI JAPAN CO., LTD known as RGBlue of High color rendering light.