Yesterday, while diving in Vis, I found an ancient Roman jug. I reported in to the Croatian Ministry of Culture and Media and they will let me know when they can come to recover it. Here is a photo what it looks like.
If you find any object of archaeological interest under water or on land, then report it to the relevant authorities. Do not move it off site. Leave it where you found it, unless there is a possibility someone may steal it.
This is not the only treasure I have found. You can read about my other discoveries here.