These are new...

[Antegon]

I have had this tank for years, and never seen these. Tonight they are zipping all around my tank and crawling on the glass. A few dozen in a 55g mixed reef. Any ideas? Am i in trouble? Thanks for the help!

 

[Antegon]

Also, these little mounds of grey sand have been appearing recently in one area. It looks like a doodlebug mound, if that helps anyone. Really hard pic to get but here’s a couple. I don’t know if these are related or not.

 

[Ranjib]

Nah, these are copepods , good micro fauna

 

[Ranjib]

Do you have anything (like wrasse or mandarin) that eats them? Time to time their population explodes. It should fix itself,

 

[Antegon]

Great, good to know! I don’t as of now, building into a 75g before any other livestock is added. I’ll take the pods as a good sign. Thanks!

 

[Reef Stu]

Do they look like this?

 

[Antegon]

Do they look like this?

I mean it’s hard to tell. Those photos I sent are about as close up as I can get. They are white irl. But it does look v similar with the split in the front

 

[Reef Stu]

This is the closest I have found.

 

[Reef Stu]

I think that the ones in my tank are thinner with shorter legs but very similar front claws. So I’m assuming some variation of isopod is what we have.

 

[Antegon]

I think that the ones in my tank are thinner with shorter legs but very similar front claws. So I’m assuming some variation of isopod is what we have.

Yes I agree.
http://reefkeeping.com/issues/2004-08/rs/index.php
Saw some v similar looking isos on here.

Good hunting with you!