- For the international version of this level, see Pirate Seas - Day 4.
- For the level before the v1.8 update, see Pirate Seas - Day 4 (Chinese version: pre-1.8).
Pirate Seas - Day 4 is the fourth level of Pirate Seas in the Chinese version of Plants vs. Zombies 2. It is the first Cannons Away level, the Brain Busters exclusive to Pirate Seas. In this level and any other Cannons Away level after that, the player has to defeat Seagull Zombies with five Coconut Cannons, and they have to reach a certain number of points to complete the level. When this level is finished for the first time, the player a number of coins depending on the score.