Google's homepage features artwork of magical cat Momo swimming underwater and charging at a group of Ghosts alongside a play button.
The game tasks players with using their mouse to swipe in the shape of symbols placed above the ghosts' head in order to defeat them.
The title, which acts as a sequel to Google's 2016 Halloween game also featuring Momo, runs for four stages that are filled with power-ups and boss battles.
"Feline lucky? Swim and swipe to PURR-tect the ocean and its creatures before it's too late," Google says.
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