I think that this one is a Replaced Remain. It is a replaced remain fossil because there is still parts of the fish like the bones, but some areas have been replaced with other material. The dark brown, which I'm guessing is some part of the ground, has replaced some soft tissue and bony parts of the fish.
The one above is an Original Fossil. I know this because you can clearly see the whole insect preserved in the amber. It appears to have no limbs missing, and all the soft tissue still there.