Can someone ID this?

does it regroup after it falls apart? It seems like something is building a burrow. Using mucus to hold the outside together which would explain why as soon as you touch it, it falls apart.

 

here is a thought... Make it fall apart totally, come back in a hour or so and watch and see what happens. If you dont see anything, turn off the lights and some other ambient light in the room where you can see that area. If something is buildiing that, it will rebuild it.

 

I would say something is making it. do what geekdafied said and just watch it whatever is building it will do it again. how big is it

 

I've seen this sort of thing at the beach at low tide. I thought it looked like sand that had been excreted by a snail or something that shape, and stuck together with a slimy coating. As soon as you touch it, it falls apart. Any snails that size in your tank?

 

Do you have any wrasses in the tank?

 

I have about 40 different kinds of snails in the tank and no I don’t have any Wrasses.
Here what I did last night I rearranged my rock because I had originally had to many dead spots and not enough surface area for my corals. I completely destroyed the two funyuns.....lol that I had and no one tried to rebuild anything last night..... I was up until about 12 am looking and searching.

 

Those "funyuns" are sand collars. Some type of mollusk eggs. Commonly being moon snails. I found them on the net... Just do a search on sand collar.

 

That doesnt mean that is a moon snail doing that, conch's do too along with other kinds of snails.

 

well crud, someone beat me to it... i knew as soon as i saw the pic that it was a snail egg... i saw a pic similar on another forum, looked like a UFO! i told them to sell it on ebay as an alien egg!

 

hahahahaha@alien egg