Little critters in the sump

William Morris · Nov 30, 2019

showed up in my sump a couple of days ago. With a net I can scrape them off the glass
and they just turn to mush. Anyone know what these are?

lapin · Nov 30, 2019

If they dont move they could be pineapple sponges or another small sponge. Its hard to tell without a close up macro shot

William Morris · Nov 30, 2019

Don't appear to move - my concern was they look like a worm and I want to be proactive if they end up being bristle worms.

Terri Caton · Nov 30, 2019

William Morris · Nov 30, 2019

Terri - the email version of the chat stated that you think it's a worm and they are good guys. Not sure what happened in the thread above.

Terri Caton · Nov 30, 2019

I was mistaken. Not sure what they are. The little round dots are what I saw and I know they are fine.

William Morris · Dec 1, 2019

This is a better photo of the critters.

stanleo · Dec 1, 2019

I would think some kind of flatworm. Are you sure they don't move? Or could they move very slowly? Could be some kind of bacteria if they really don't move.

Have a read here about worms in our tanks.

How to Identify Worms in Your Reef Aquarium

How do you tell which are reef safe and which are not? Here's a handy guide to help identify some common saltwater worms and whether they are reef safe or not.

www.extreme-aquatics.com

TheShrimpNibbler · Dec 1, 2019

stanleo said:
I would think some kind of flatworm. Are you sure they don't move? Or could they move very slowly? Could be some kind of bacteria if they really don't move.

Have a read here about worms in our tanks.

How to Identify Worms in Your Reef Aquarium

How do you tell which are reef safe and which are not? Here's a handy guide to help identify some common saltwater worms and whether they are reef safe or not.

www.extreme-aquatics.com

I agree, looks like flatworms.