What is this creature?

[Ukreeferguy2020]

Does anyone have any idea what this creature is? It is in my maroon clown baby grow out tank. The only live food that I add our baby brine shrimp and a few copepods and when I've looked today, I've seen these tiny octopus looking things in amongst the hair algae growing on the live rock.

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[Misled]

They look like baby aptasia.

 

[Sugar Magnolia]

Yep, aiptasia. You'll want to get rid of those before they spread throughout the tank.

 

[Ukreeferguy2020]

I've taken most fo them out already. However there is only one piece of rock in there as its my clown fish grow out tank. But thank you.