Mystery sea sponge

[guppyexpress]

this sponge just kinda…. Appeared?

any ID on it?
Is it harmful to my reef? I’ve been reading mixed information on it.
Thanks so much! And have a wonderful day

(Sorry for low quality image)

 

[EeyoreIsMySpiritAnimal]

What makes you think it's a sponge? Are we talking about the brown branched thing?

 

[guppyexpress]

What makes you think it's a sponge? Are we talking about the brown branched thing?

yeah the branch thing. i know its a sponge as
i was cleaning my aquarium and that was you know. there. and i went to remove it, and it felt quite spongy. not hard, not slimy, not leathery. just felt like it a sponge. felt like it had a bunch of holes in it, and was you know. spongy feeling lol

 

[EeyoreIsMySpiritAnimal]

Ummm......