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Nudibranches that can only be seen at night

Nudibranch Night Diving Specialty Course

UMIUSHI Night Diving SP

Available every day starting from 1 person!

Some nudirbanches hide in the sand during the day and are only active at night. In this course, we will observe and record the nudibranches seen at the dive site during the day and compare them with those seen at night. 


Nudibranch Night Diving
Specialty Course

[Course fee]
Diving fee:12,000 yen
Dive ①4.500 yen
Dive ②2,000 yen
​※Registration fee incurred separately

[Details] 1 day
Knowldege Development (lecture)
Open Water Dive (2 dives)
*1 d
uring the day, 1 at night
*Extra dives possible during the day 
for an additional 4.400 yen
Equipment rentals included
Teaching materials included

Lei Aloha Taro Yamaguchi

There are still many things we don't know about the habits of sea slugs at night. By observing, you may be able to meet unknown facts, perhaps even a new species.


Nudibranch night diving allows you to see different nudibranchs at the same point as usual. Such as those that are active only at night, those that are more active at night. And there are also dive sites where sea nudibranches gather only at night.

West Izu Store

13-41 Minami-honcho, Mishima city, Shizuoka Prefecture

East Izu Store

908-139 Futo, Ito City, Shizuoka Prefecture



English-speaking staff available via Email only.

We apologise for the inconvenience.

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