Hey Gatorboy. You're right that they are shark teeth. But they are not whole. Most likely, they are the curved end of Hemipristis Serra teeth, with the other half broken off, then worn cleanly. The reason they look whole is because underneath the enamel covering is a bone like material. Usually this material comes up as the same color as the root, which makes them easily confusable. Keep up the work and if you're ever looking for another vessel for trading finds, hit me up.