129 dead tunas found to have broken spine / Experts “can be caused by stress and mass hysteria”

Following up this article.. Over 80% of Tuna died since December in a major Tokyo aquarium [URL]


From autopsy inspection, the dead tunas were found to have broken the spine. The cause is not identified.


Since Fukushima Diary reported about the mass death of tunas on 1/14/2015, 13 more tunas died by 1/17/2015.

Currently only 17 tunas are remaining in the glass tank. They assume all the tunas can die before February.

The aquarium announced no abnormality was found in the quality of water, also they are carefully controlling the circumstances to minimize the stress of the tunas.


An expert from Fisheries Research Agency of the Ministry of Agriculture, Forestry and Fisheries comments it is not rare that tunas have mass hysteria from stress and die from crashing against each other or the tank. However the aquarium states they haven’t experienced such large number of tunas die rapidly as now.


Because the aquarium doesn’t have a plan to charge new tunas, it is impossible to compare the behavior of new tunas and old ones.









Français :

129 thonidés morts colonne vertébrale brisée – Experts : “Ce peut être à cause d’un stress d’hystérie collective”


Article lié : Depuis décembre dans un des plus grands aquariums de Tokyo plus de 80% des thonidés sont morts

Selon les conclusions des autopsies, les thonidés morts avaient la colonne vertébrale brisée. La raison n’en est pas encore connue.

Depuis que le Fukushima Diary a rendu compte de la mort collective de thonidés le 14 janvier 2015, 13 de plus sont morts au 17 janvier 2015.
Il ne reste actuellement plus que 17 thonidés dans l’aquarium. Ils pensent qu’ils pourraient mourir d’ici février.
L’aquarium a déclaré n’avoir trouvé aucune anomalie dans la qualité de l’eau, ils surveillent aussi méticuleusement les conditions pour minimiser leur stress.

Un de l’agence de recherche des pêches du ministère de l’Agriculture, de la Forêt et des Pêches déclare qu’il n’est pas rare que les thons aient des phases d’hystérie collective suite à un stress et meurent de se percuter les uns les autres ou contre les parois de leur aquarium. Toutefois, l’aquarium affirme qu’ils n’ont jamais observé de morts aussi massives dans un temps aussi court qu’à présent.

Il est impossible de comparer le comportement des nouveaux thonidés par rapport à celui des anciens parce que l’aquarium n’a pas prévu de prendre de nouveaux thonidés.


About this site

This website updates the latest news about the Fukushima nuclear plant and also archives the past news from 2011. Because it's always updated and added live, articles, categories and the tags are not necessarily fitted in the latest format.
I am the writer of this website. About page remains in 2014. This is because my memory about 311 was clearer than now, 2023, and I think it can have a historical value. Now I'm living in Romania with 3 cats as an independent data scientist.
Actually, nothing has progressed in the plant since 2011. We still don't even know what is going on inside. They must keep cooling the crippled reactors by water, but additionally groundwater keeps flowing into the reactor buildings from the broken parts. This is why highly contaminated water is always produced more than it can circulate. Tepco is planning to officially discharge this water to the Pacific but Tritium is still remaining in it. They dilute this with seawater so that it is legally safe, but scientifically the same amount of radioactive tritium is contained. They say it is safe to discharge, but none of them have drunk it.


January 2015