When it comes to Snorkling in Florida, it doesn’t get much better than Crystal River. Featuring crystal-clear water, an average year-round temperature of 72 degrees (hot spring-fed waters), underwater caverns, and a wide variety of wildlife such as tarpons, redfish, grouper, dolphins, and one of the largest concentrations of the West Indian Manatee. From November through March, be prepared to meet the gentle giant of the river, the Florida manatee, source of the mermaid legend.