Egg sack?

[TLKAg87]

it looks like a spider’s egg sack on the underside of the rock. Appears to be 3 or 4 of them. Should I worry?

 

[Reeferdood]

Yep,
pineapple sponges... Nothing to sweat..

 

[TLKAg87]

Yep,
pineapple sponges... Nothing to sweat..

So leave it alone?

 

[Reeferdood]

Yep, filter feeders that are harmless where they are..

 

[TLKAg87]

Yep, filter feeders that are harmless where they are..

Thanks

 

[Reeferdood]

Welcome!

 

[KJ]

Ball sponge.