Along the Emerald Coast, it's fairly common to see dolphins, manta rays, sea turtles and other marine animals. But manatees cause more of a stir. That's why Niceville veterinarian Jenny Fortune and her husband were slow to identify what was swimming between them in hip-deep water near Fred Gannon Rocky Bayou State Park recently. "I'm looking at it, going ‘Oh my God, what is it?' " Fortune said. "These things are giant. Your brain just doesn't compute." She said they first thought it might be a large manta ray. They quickly realized that the creature wasn't flat, but very, very...