Collecting Fluorescent Shells 

Some seashells will fluoresce bright colors under long wave ultraviolet light (i.e., LW UV or Blacklight). This video shows the very colorful and interesting shells I found for a fluorescent shell collection. A new high power LED LW UV flashlight was used to search through several shell stores and two shell shows in Florida.
For more details on these shells, see hamblen.ece.gatech.edu/UVShells