We’ve learned that these translucent pulsating ghosts possess a seriously painful sting, and they often travel in pods. While their range extends from the Caribbean up to southern Cape Cod, they flourish in Chesapeake Bay. Apparently we were lucky to swim where we did — in the Sassafras River’s fresh water. Now these creatures have fringed out around Strider’s hull, defending their demesne like dementors guarding Azkaban. Its 80F and the water is 72F, but even Colin doesn’t want to take a dip!