As of right now, there aren't any consistent, known skips in Piranha lake - just play through this normally for now, lighting all of the torches and using the START + view map → HUB to skip the key cutscene.

There is a known fish skip that lets you skip the entirety of this mini-game, as normal, use START and View Map to skip the key cutscene that plays at the end of the mission.

F I S H SKIP (no explanation)

• A more recent addition, Fish Skip is as the name suggests, a skip for Fish. This is, however - E X T R E M E L Y inconsistent as of now. The main issue being that the vehicle used bobs while in motion, it's difficult or impossible to predict everything for this correctly, and it might be something best left to RNGesus.

Post-Fish

• There is a slight optimization to go from Piranha Lake to Grave Undertaking: