In the pilot of Blue Planet II, we are introduced to the dramatic scenery of Northern Japan, where life teems beneath the surface. Out of a patch of flora emerges the rather odd looking male Kobudai, a one meter long fish weighing around 15 kilos. His bulbous head and protruding chin give a sort of... Continue Reading →

The Masters of Sex-Change

In Blue Planet II, Episode 1: One Ocean, we are introduced to the Kobudai fish, an example of the sexual fluidity of fish. After 10 years, a large female Kobudai fish undergoes a several month-long transformation into a large, bulbous and aggressive male. These are known as sequential hermaphrodites, and in the Kobudai fish case,... Continue Reading →

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