Can someone help me identify this tadpole? The last few batches of tads the frogs left in the same kiddie pools (meant for the dogs) were Gray Tree Frogs - but these guys look different.

For one they all have a dark spot on their back at the base of their tail. Their underbellies are a golden shimmery color and their tummies look a little more bulgy then the others. When looking down on them they also seem more round in shape.

Maybe I'm just not remembering my Grays when they were tads, but I would appreciate your opinion.

I want to take them to a local pond, since I already have 4 Grays and not any more space for more. But I want to make sure that I'm putting them where it is best for them.

Your help would be greatly appreciated!

Frognut
Link