Nemertea; a name derived from the name of the ancient Greek Sea Nymph or Nereid, known as Nemertes, "the unerring one."

Some of the truly parasitic forms live on crabs and are egg parasites. On the west coast of North America, Carcinonemertes species are found infesting several species of crabs. These are tiny nemerteans that live on the outside of the crab's carapace. They eat the eggs of the crabs; each worm can eat an egg or so a day. An infestation of several dozen worms can effectively eat the entire yearly spawn of the crab. These particular nemerteans can be of immense economic importance, and have been credited with single handedly destroying the economic viability of several Dungeness crab fisheries along the coast.

Some can reach a length of 30 meters with a body diameter of only a few millimeters.

"architecture is politics."

The world of Web 2.0 is also the world of what Dan Gillmor calls "we, the media," a world in which "the former audience", not a few people in a back room, decides what's important.

If an essential part of Web 2.0 is harnessing collective intelligence, turning the web into a kind of global brain, the blogosphere is the equivalent of constant mental chatter in the forebrain, the voice we hear in all of our heads. It may not reflect the deep structure of the brain, which is often unconscious, but is instead the equivalent of conscious thought. And as a reflection of conscious thought and attention, the blogosphere has begun to have a powerful effect.

t is a truism that the greatest internet success stories don't advertise their products. Their adoption is driven by "viral marketing"--that is, recommendations propagating directly from one user to another. You can almost make the case that if a site or product relies on advertising to get the word out, it isn't Web 2.0.

Collaborative spam filtering products like Cloudmark aggregate the individual decisions of email users about what is and is not spam, outperforming systems that rely on analysis of the messages themselves.

Wikipedia, an online encyclopedia based on the unlikely notion that an entry can be added by any web user, and edited by any other, is a radical experiment in trust, applying Eric Raymond's dictum (originally coined in the context of > open source software > ) that "with enough eyeballs, all bugs are shallow," >