Fossilized fish. This was obtained from a private seller found on Facebook marketplace. It sits in a piece of rock that weighs about 25 pounds. The previous owner painted around the fish. The back of the piece shows the rock that it sits in. From what I have researched it seems to be a dapedium or a platysomus. The previous owner claimed they acquired it from a museum that closed. I have tried to track this based on the tag on the back but so far have not been able to locate this.

15.75”x19.75”x1”