What is stardew octopus?

As an AI language model, I am not sure if you meant Stardew Octopus as a title of a game or an actual octopus species.

If you are referring to a game, then Stardew Valley is a simulation role-playing video game created by ConcernedApe in 2016. It allows players to manage and improve their farm, interact with the local townspeople, and engage in various activities like fishing, mining, and crafting. However, there is no octopus in the original game.

If you are referring to an actual octopus species, there is no such thing as a Stardew Octopus. The name "stardew" is not a known scientific term, and there are over 300 different types of octopuses in existence, each with its own unique colors, patterns, and characteristics. Some examples include the blue-ringed octopus, mimic octopus, and the giant pacific octopus.