Who says 49ers fans have to be instructed by their team in how to be fans? They are learning from the masters — the 12th Man.

After Seattle fans hired a small plane to trail a 12th Man banner over Candlestick Park during the Seahawks game, 49ers fans are plotting a counter-move — a billboard near the Clink that taunts the Seahawks for the absence of a football pedigree.

According to the San Jose Mercury Tuesday, Bay Area fans have raised $8,000 to put up a proposed billboard featuring five symbols of their Super Bowl wins — the Lombardi Trophy — with a headline, “How Many Do You Have?”

It’s a shot at the Seahawks’ meager history — 0-for-1 in Super Bowl appearances.

The project was expected to cost fans $7,000 and has already raised more than $8,000 online. According to the project’s founder, Aasheesh Shravah, all extra money will be contributed to Seattle Children’s Hospital.

“I called up Seattle companies and got some prices, and we figured if we could raise at least $7,000, we’d be able to do something in response to the banner. So many people responded. It has been amazing the support this thing has received.”

Only the six trophies by the Pittsburgh Steelers — another team that is toxic to the tongues of Seahawks fans — exceed the five by the 49ers and Dallas Cowboys.