Okay so, I recently bought 2 Blue Phase tree frogs and, they are both smaller then the ones I've previously owned. Thus when I got them home I was unsure about their behavior.

Usually my younger frogs are more energetic but these ones have been hanging out in their water dish more or less perpetually. At first I wasn't worried because the crickets still disappeared from their cage but this morning it was a little different.

One of them lay stretched out across the water dish totally submerged in water. (Past it's nose.) If this wasn't alarming enough, it's color also changed from dark blue to bright yellow-green. (More like a non-blue phase) Because this was my first time having a blue phase I wasn't sure if the color meant anything but I did promptly take it out of the water to make sure it was still breathing. It was but it seemed oddly lethargic. (Young frogs usually care more when a scary human hand picks them up.)

I put him back in the cage away from the water dish but came back to check on him/her a few hours later. When I returned it was again totally submerged but this time it seemed stiff and the other frog was out of the water dish. I removed the green frog and found it dead.

I promptly cleaned the cage thoroughly and put the healthy frog back in, this time with less water so it could not float in it/ totally submerge it's self. My question is... did it somehow drown or was it ill? (I seem to have a lot of bad luck with frogs and water. >_>)