Nation Frenzy of marine worms swarm coastal waters in South Carolina, an annual event that means spring is here April 27, 2021 Dustin Barnes, USA TODAY Comments Off on Frenzy of marine worms swarm coastal waters in South Carolina, an annual event that means spring is here Millions of clam worms were spotted in a harbor earlier this month, but don't worry. Even though they can bite, they're not here to eat people.