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.
The Worm Ouroboros was created in 1922.
Worm Infested was created in 1996.
Slimey the Worm was created in 1981.
The Electric Worm was created in 2007.
Worm Interface was created in 1994.
Worm - comics - was created in 1989.
The House of the Worm was created in 1975.
Funky Worm was created in 1973.
A Little Worm was created in 1995.
Worm pipefish was created in 1835.
Pizza Worm was created in 1994.