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.
ラベル ヤエギスの稚魚 の投稿を表示しています。 すべての投稿を表示
ラベル ヤエギスの稚魚 の投稿を表示しています。 すべての投稿を表示

2017年12月17日日曜日

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.

ヤエギスの稚魚
Larval-fish of Manefish 
ヤエギスの稚魚
Larval-fish of Manefish

fishbase.org
http://www.fishbase.org/summary/11831

Distribution Map(fishbase.org)
http://www.aquamaps.org/receive.php?type_of_map=regular

REFERENCES:
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).

<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。大人は深海浮遊性で、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。