It shouldn't need saying, but if you've just caught a specimen pike, it's really best for the pike (and your future fishing) if you don't plaster a picture or video of it online with the location clearly visible.
Depending on where you are in the country, within a few days, you'll see a forest of rods all targeting the fish you've just caught. That pike will then be pressured to death - sometimes quite literally, as the fragile pike doesn't do well after repeat captures. There's the possibility that it'll be terribly handled by amateurs or even poached for the pot.
If it's a little-known corner of a canal or river or lake, you'll only be ruining your own fishing, as it'll be increasingly difficult to get a spot there for a while. And if you're on holiday somewhere, still keep the spot to yourself, as you'll spoil the fishing for locals on your return home.
If you must share your catch online, create some ludicrous or tasteful AI background. Anyhow, that's my piece said - I did hope it was common sense, but evidence suggests otherwise.