what the heck is this thing?!? It’s angry!

[Just_Another_Reefer]

Feather duster looking thing. It doesn’t react to light. It reaches out for fish food looks like a feather duster and that worm from star wars had a baby

 

[Lost in the Sauce]

Homie you circled something under blues in a shadow. I don't think anybody could accurately positively ID that that without 50% guessing. Can you get a clearer picture out of the shadow under white lights?

 

[Tired]

White lights would be good, yes.

Does it move? If so, how?

If you tap it with something, does it do anything?

I'd guess aiptasia.

 

[UnderseaOddities]

Looks like a majano anenome or maybe some kind of barnacle it's hard to tell from the pic as stated by @Lost in the Sauce 85% sure it's a mahano tho next time ur sucking out detritus just suck him up it's better then it splitting and stinging

 

[UnderseaOddities]

Kinda looks simmilar up close they reproduce like aiptasia and come in a multitude of colors