ChrisOzment;203870 wrote: After checking it out this morning, I agree - they are the normal little white things on the back of the tank. I think little worms?
But the swallowtails where going up and down in a small section of the back of the tank next to each other last night so they must be spawning. They really don't hang out that much together during the day so it was not normal behavior.
And they only seem to do it when the lights go out.