"They sit on the bottom of the ocean", leaving "happens only once a year for most species" of jellyfish
Report: Unusual jellyfish surfaces in New Smyrna Beach, Orlando Sentinel, June 25, 2010:
These jellyfish are so clear, some beachgoers can't see them.
Lifeguards in New Smyrna Beach say the kind of jellyfish washing up in New Smyrna Beach is new to the shores of Volusia County, according to cfnews13.com.
Their bodies are so clear, some beachgoers don't see them. Their stings aren't as painful as those from the Portuguese man-of-war, cfnews13.com said.
To read the full story on cfnews13.com, click here.
However, the story is no longer available on the Channel 13 News website. The page is blank, but the address includes the phrase "Unusual-jellyfish-washing-up-on-shores".
Jellyfish infiltrate New Smyrna Beach, Daytona Beach News Journal, June 26, 2010:
Unseen creatures surprised New Smyrna Beach swimmers this week, leaving them stung and wondering what the heck happened.
The stings are being inflicted by clear jellyfish that are nearly invisible, said Capt. Scott Petersohn, spokesman for Volusia County Beach Patrol. ...
No one knows when or why jellyfish blooms occur on Volusia and Flagler beaches, though the area often gets a jellyfish outbreak in early August.
"Some years we'll get them where they're really bad," Petersohn said. "They really are slaves to wind and currents." ...
They sit on the bottom of the ocean much like a sea anemone and asexually reproduce the offspring that grow into the medusae, the bell-shaped animals "we all know and love."
That happens only once a year for most species.