Reddish translucent Blob Identification

[GT_b_me]

So this thing... any idea?

Popped up about three weeks ago, now about 4 to 5 inches across. It's firm like a jelly fish, basically just full of water. Looks like a crumpled bag stuck to a rock. Thinking maybe a sponge of sorts, or just some odd fungus of some kind. I plan on carefully pulling it out soon but wanted to share the pics and try to identify it first since I've been in the hobby for 15 to 20 years and I've never seen anything quite like it before. It's interesting... whatever it is. If I come down tomorrow to find it's out of the tank and the dog is missing I'll know I waited too long!

Growing fast whatever it is! It's in an established (6 months) 300 gallon mixed reef with stable parameters. Some hair and bubble algae but nothing too crazy, except this blob that seems to have found it's way into the tank via a frag recently.

 

[ISpeakForTheSeas]

Some sort of brown or red macroalgae - can you get some pics under white light?

 

[GT_b_me]

red macroalgae

Here you go, warm and cool white at 100% everything else off. It's like a big bag, sealed and full of fluid.

 

[GT_b_me]

Here's a few more with just the white lights on in case it helps.

 

[ISpeakForTheSeas]

Here you go, warm and cool white at 100% everything else off. It's like a big bag, sealed and full of fluid.

See if Colpomenia is a match.

 

[vetteguy53081]

Here's a few more with just the white lights on in case it helps.

Indeed macroalgae as suspected and some regard it as seaweed

 

[GT_b_me]

See if Colpomenia is a match.

Other than a definite reddish tint, I believe this is a match, well done. The images when googled are very similar. This thing is actually rather pretty but at the rate that it's growing has got to go. It's literally grown another inch overnight and has caused the bubble tip to move as a result.

Thank you for the help in identifying my blob, pretty sure you nailed it!

 

[bafia]

I'll take it off your hands if you don't want it! Haha.

 

[tharbin]

Welcome to R2R! Looks like you got an answer in your other thread about the blob.