What are thooooose?

[Reefing Reefer]

I’ve recently had an outburst of critters in the return section of my nano aquarium. My water parameter haven’t changed, livestock is happy, so I’m left wonder what these are and if I should remove them by cleaning out the return chamber.

Any and all insight and suggestions are much appreciated.

 

[jrawk1120]

Those are pods. You want those.

 

[PicassoClown04]

Do they look like slugs?

 

[WV Reefer]

I’ve recently had an outburst of critters in the return section of my nano aquarium. My water parameter haven’t changed, livestock is happy, so I’m left wonder what these are and if I should remove them by cleaning out the return chamber.

Any and all insight and suggestions are much appreciated.

Pineapple sponge. Good guys.

 

[Ckdada]

+1 pineapple sponges

 

[Reefing Reefer]

Do they look like slugs?

No, they almost look like eggs?

 

[PicassoClown04]

No, they almost look like eggs?

Probably pineapple sponges or sea squirt type things. I have a few on my heater. They looked a little like baby stomatella snails but that ruled them out

 

[homer1475]

Pineapple sponge.

Just google it and compare pictures. Perfectly harmless, and actually are filtering your water.

 

[Postullio]

Pineapple sponge

 

[vetteguy53081]

+1 on pineapple sponge and harmless filter feeder