There are numerous other types of fossils to be found from prehistoric creatures such as whales, gators, giant three toed sloths, fish , and much more. You can even bring home something that was lost to the river yesterday. You'll need a flashlight because the visibility avrerages about 3 ft. Expect river currents due to possible released water from the dam and tide changes.
Common sense advises experienced divers only.
Bring your own gear. Arrange your own trip. Plan your dives and dive your plans. This is a hands on experience for the organized and qualified boat leader or group rental. There are many activities for divers and non divers alike.