A type of airplane fighting game, but this time you are controlling a submarine and experiencing fishing in the deep sea.
During this process, players will encounter a large number of fish that hinder their progress. The underwater world has a variety of marine creatures, some of which have special abilities. Players need to pay special attention to some fish that look particularly strange.
Collisions with fish or impacts from ocean debris can damage submarines, and if the damage accumulates to a certain extent, the submarine will be destroyed.
The game features over a dozen types of cannons, hundreds of different fish, over a dozen unique talents, and dozens of different growth items.
The game has two modes: Endless Mode and Level Mode
Endless Mode:
In this mode, the game will have no completion conditions and the only goal is to achieve higher scores.
As the depth increases, the fish will become stronger, but you will also become stronger, provided that you choose various growth resources in the sea.
There are probably dozens of growth options to enhance your submarine, such as bullet count, firing rate, special weapons, tracking missiles, etc.

Level mode:
Players can only use one submarine and one of several optional cannons. In addition, players can also upgrade submarines and cannons.
Different cannons cannot be freely chosen at the beginning;
As the submarine level improves, more cannons will gradually be unlocked. Each cannon has its own unique characteristics.
The player will also have a companion piloting another submarine to assist in combat, but she will only appear at specific times or when the player gains special skills.
The player's submarine possesses special skills and talents that require strategic decision-making. Throughout the game, players will also receive temporary buffs with various effects, as well as some debuffs that weaken their abilities. Players can also upgrade specific attributes of various buffs on the buff interface.
All upgrades require gold coins, defeating fish can earn gold coins. Of course, there are also some hidden ways to obtain coins that players need to explore and discover on their own!