Sentience is a weird thing, isn't it.
You don't have to be a philosopher, to have at some point wondered at some point whether the mind rules the body, or the body rules the mind. So, I'm guessing this video is going to have you questioning all sorts of things.
But first have a look a picture of this yellowfin tuna, cut in half.
Credit: Twitter
Pretty standard that really. I don't know about you but that fish sure looks dead to me. Just dead tuna sitting there ready to be poached, or fried, or steamed, or... wait just one second:
魚の生命力が凄い
Apparently that tuna ain't dead at all, flapping around for quite a while, despite quite clearly having been chopped in half.
Posted by Yutaka Suzuki, the clip shows the fish floundering for more than a minute and a half in the tray.
Users on social media have pointed out that the fish's nerves may not have been properly severed when it was cut, meaning that they weren't properly rendered inactive.
Credit: Twitter
It's likely that its brain had died at that point, only for its muscle motor neurons to continue to be triggered by electric signals.
Typically a Japanese fishermen will insert a spike into a fish's hindbrain, which causes immediate brain death and prevents any involuntary muscle reflexes.
This method is referred to as ikejime - and apparently also means the fish tastes better.
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One guy had his own theory about what was going on:
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To be honest I'm not sure whether he's onto something, but who know.