Weird bubble jelly growth?

[Wowkuh]

anyone know what this is? Its actually growing and today I noticed 2 more areas of smaller ones (which would probably grow as well)

180g
A few corals
Tank has been fallow for a few weeks now, no new introductions (of coral/inverts) for a few weeks as well. I have 4 turbos, various hermts, sea hare that been in the tank for about a year and some strange slug that I haven't personally, intentionally put I'm the tank.

Watch "Weird jelly" on YouTube

 

[Wowkuh]

Here is the slug that I recently discovered in my tank that I never introduced lol.. potentially harmful slug?

Watch "Slug" on YouTube

 

[PDR]

I'm not sure what is in the first video, kind of looks like bubble algae but not really. The "slug" is a stomatella snail, good cuc member.

 

[Wowkuh]

I'm not sure what is in the first video, kind of looks like bubble algae but not really. The "slug" is a stomatella snail, good cuc member.

Maybe other members can join in. It's weird. its deff not bubble aglae tho

 

[PDR]

#reefsquad - any ideas on the first video?

 

[Lovemyreef2015]

Is it hard or soft to the touch? In the video you move, is it growing in more then one location?

 

[saltyhog]

Is it soft like jelly or does it feel like a water balloon? Maybe some kind of sponge?

 

[Lovemyreef2015]

Possibly a ball sponge. Here is a picture of one

 

[Crabs McJones]

Google image oyster thief algae and see if it matches what you're observing. Also the slug is a stomatella

 

[Ron Reefman]

Oyster Thief Algae appears to be more of, but not exclusively, a cooler water inhabitant.

My thought is it's a sponge. Looking as closely as I could in the video, it appears the bigger 'jelly' has a hole in it and so did the second one that the OP panned over to. That is, if I'm not seeing things that aren't there! If those are holes, they could be the osculum, the hole where water that has passed into the sponge then exits.

 

[Wowkuh]

Is it hard or soft to the touch? In the video you move, is it growing in more then one location?

Yes its growing g in other areas too

 

[Wowkuh]

Oyster Thief Algae appears to be more of, but not exclusively, a cooler water inhabitant.

My thought is it's a sponge. Looking as closely as I could in the video, it appears the bigger 'jelly' has a hole in it and so did the second one that the OP panned over to. That is, if I'm not seeing things that aren't there! If those are holes, they could be the osculum, the hole where water that has passed into the sponge then exits.

I believe there's a hole...

 

[Wowkuh]

Yep, its soft

Watch "January 27, 2019" on YouTube

 

[S-t-r-e-t-c-h]

It looks like a small sarcophyton leather, IMO...