I've seen seeds beginning to sprout inside a fresh lemon. The flavor of the lemon was a bit off.

Image is too blurry to see what's going on. Try to focus on the structure you want us to see. That fruit looks way too underdeveloped to have a seed sprouting in it.

Sorry the pic was blurry. I went back to take another picture and whatever it was growing out of it has broken off and gone. Guess I'll never know for sure what it was. Thanks for the replies though...