A new species of Portuguese man-of-war discoverd for the first time in the tohoku region – Named “Mikazuki no Eboshi” after Date Masamune

2025 | Press Releases and Research Results

Tohoku University just released a press release show casing the most recent lab discovery at Sendai Bay. The before-mentioned “Mikazuki no Eboshi”

The emergence of this species may be related to changes in the marine environment caused by climate change, such as the northward shift of the Kuroshio Current and rising sea temperatures. The northward movement of poisonous species not only changes the ecosystem, but also requires caution when swimming in the sea.

This is the first record of the Portuguese man-of-war genus in the Tohoku region. Furthermore, particle tracking simulations revealed that the northward shift of the Kuroshio Current and rising sea temperatures may be related to the emergence of this species. The observation of the Mikazuki no Eboshi provides important evidence that climate change is affecting the distribution of marine life.

You can find the Scientific paper here:

You can find the full press relese here: