Looks like a bumblebee (crabro) to me!
I think you are right. Do you think it's a male or a female? Its about 2.5" right now.
Gulf Stream is correct. Are there any other crabro a in there? They have the ability to flash colors. Dominant a males are normally brown. They have a symbiotic relationship with a type of bagels catfish in the wild look it up it will explain their colors much further.