Bobbit worm was created in 1788.
Usually not. They're either predators, scavengers or algae-eaters. Most of them are scavengers. The only omnivorous marine worm I could find anything on is the Bobbit worm, which is a truly nasty piece of work: they average ten feet long (I've seen reports of 50-foot Bobbit worms), can take off a human finger and eat fish up to four inches long. It's called the Bobbit worm because after it mates, the female bites off the male's penis and feeds it to her offspring.
Pizza Worm was created in 1994.
The Glow-Worm was created in 1902.
Funky Worm was created in 1973.
A Little Worm was created in 1995.
Worm pipefish was created in 1835.
Doctor Worm was created in 1998.
A Worm's Life was created in 1996.
Worm Interface was created in 1994.
Slimey the Worm was created in 1981.
The Worm Ouroboros was created in 1922.
Worm Infested was created in 1996.