Inktopus

Inktopus (Korean: 방울문어, bangulmuno) is an Epic Pet that was released alongside its owner,, during the Black Sugar Pirate Ship update. It has the ability to collect Jellies and spit out Ink Jellies at set intervals.

Story
''A funny little sea creature, full of black ink. Inktopi are famous for their ability to express feelings with their ink: they spit ink whenever they are happy, sad, sleepy or active. However, only a specialist can distinguish the subtle nuances of their peculiar language!''

Trivia

 * Inktopus' description specifically implies it comes from a whole species of Pets just like it.