Pike doesn't count as a "big fish"

[jordancoles]

It is a 1x2 fish but doesn't count for quests

And they're pretty big bro

[Enjoyment_2]

it always worked normally. are you sure it stopped?
In rare cases you can catch the pike which was dropped into the water by someone else, so your catch is not a true catch but more like trash.

[Kaios]

Looks like this does not count to complete the quest with any big fish that is acquired through the water item pool.