tiny blue eggs?

In my tank I have a mated pair of pperculas, a lined wrasse, yellow tang, n mandarin goby, two peppermint and one cleaner shrimp also one blue leg hermt and random assortment of snails a urchin and a starfish. MY question I did I large water change two days ago and today there is what appears to be millions of tiny bright blue eggs stuck together in a fecal like shape just sitting on the sand. Ive never seen this in two yeats of owning my tank anyone know what it is.

 

Pics please

 

I cannot get a picture right now but its the shape of a turd about a half inch long and its almost neon blue with millions of little micro blue balls connected together.

 

Definitely sounds like an egg sack. Have you added animals lately?

 

Nopee nothing new only what I posted abovee!

 

Pic could make a positive ID