So I have read lots of forums already talking about shrimp disappearing and then reappearing later however two days ago it seems as if my shrimp were acting weird and NOW they are gone...One was swimming at the surface of the tank, seeming to actively try and get out of the water. He would do that then go to the filter flow and then try to the exact same thing against the current. After a few minutes my other Amano shrimp joined in (only two in the tank along with three Ruby tetras), then after getting home from work yesterday they are both gone. I as well as my husband have checked the tank multiple times today also. Could the weird behavior be a clue to their POSSIBLE disappearance?? Has anyone else seen that behavior before?? They had been in the tank for at least a month now if not longer. No dead bodies and only a very small area for them to have been able to jump out of the tank through.