“Ibonishi” sea snail disappears off coast of Japan.

Tokyo Web is reporting that Toshihiro Horiguchi, chief of the National Institute for Environmental Studies, and colleagues have found that the Ibonishi sea snail, or Thais clavigera, is no longer to be found in a 30-km zone of coastline near the Fukushima Daiichi nuclear plant.

This snail is widespread near the coast of Japan. The cause of this was not the tsunami, which occurred in this area, but also areas further north in which this snail has not disappeared.

According to Wikipedia, “This species has been found to be useful as an indicator of the environmental contamination levels of arsenic, copper, and zinc.”

Chernobyl researchers studying local lakes and rivers have found that “The freshwater snails have great importance for the processes of radionuclide biogenic migration in aquatic ecosystems. Due to ability to accumulate practically all of radionuclides which registries in water these invertebrates can be considered as bio-indicators of radioactive contamination of aquatic ecosystems.” Snails are an indicator of radioactive and heavy metal pollution. The freshwater snails near Chernobyl were found to have very high rates of chromosome aberrations. However, it is not stated that whole species died off there.

12 thoughts on ““Ibonishi” sea snail disappears off coast of Japan.

  1. i was wondering about this post Bobby. is it that the presence of a certain kind of snail that indicates the presence of certain radioactive isotopes?, or the opposite, or both? Looks like, it may be both, depending… please elaborate. It looks like some snails will move into an area and literally consume radioactive material, and then maybe the other, that they will die off and be gone… forgive me ..

    • It’s a common sea snail that lives in that area. They are known to accumulate heavy metals and radionuclides. The ones at Chernobyl had a lot of radiation and a lot of chromosome damage. The ones off Japan simply all died.

      • ok, so are you saying that they are somewhat ‘resilient’ to certain radioactive isotopes, to a certain degree, absorb them and are ‘ok’ until it is overwhelming, and THEN they die off?

        cuz that’s what I’m thinkin you are saying but I am not sure…

        • whoa whoa, i am so ‘dumb’ in my explaining my thoughts. I did ‘get’ that the snails typically live in the area. ok got that part, just wonderin the rest…

          • No you’re not dumb, the snails get chromosome aberrations, so their offspring are mutants… which might not survive. Or the radiation killed the snails directly. Or the snails might have moved away too.

            These snails are probably much more tolerant to radiation than we are, they are used to accumulating toxins.

            • The same radioactive seawater that killed the snails is moving across the Pacific, and will hit the west coast late this year into next year. Meanwhile, the amount of cesium-137 in the ocean is increasing, and the amount of strontium-90 is increasing much faster. Strontium-90 is very dangerous.

              Sea lions are sick, dying or dead and are already washing up on the Califirnia shore.

              • Yes,…..the long awaited ‘consequences’,…the ‘visual aids’ if you will,…in our little undercover expose! Sweeping dead RADIOACTIVE dolphin/manatee/seal,etc,..under the rug,,,,,,.isn’t as easy as their flimsy facts!

              • There’s a red tide from hell headed for the California coast. Not only washed-up dead wildlife, but cyanobacteria and fungi. It is really going to get gnarly on the coast.

Leave a Reply

Your email address will not be published. Required fields are marked *