What is this blob?

[Zalth]

Last night my girlfriend found this in the tigers' water bowl. I've seen something like it befor, a couple of years ago, but I thought of it as some kind of badly digested poo.

They are kept on coconut substrate at 19-20 degrees celsius. 2 males, 1 female.


The more I've been thinking about it, the more I think it should be something else than poo. The girlfriend tells me it has black dots inside of it that can be seen when holding a flashlight nearby.


I'm not at home for another week or so, so I can't look at it any closer. ): But it's 2-3 cm long.



Here's a pic of it:




So, what could it be?

 

[sde]

Could it be...eggs!? If so that would be awesome!

EDIT: Ok, so it doesn't look exactly like eggs but its kind of hard to tell in the picture, and what else could it be?