I don't see why people are freaking out, it was just a 100 year old fish. At that age, they probably aren't doing much breeding, it fit all the guidelines and qualifications so it was all legal and whatnot. He couldn't very well have let it go after he speared it, nor could he have asked it how old it was.
He's a spearfisherman.
That's a fish.
He speared it.
Now it's dead.
The End.
He's a spearfisherman.
That's a fish.
He speared it.
Now it's dead.
The End.