sting, where is thy death?

Kottke shares an intriguing review of a new book out by marine biologist Lisa-ann Gershwin on the curious lifestyle of jellyfish and increasing success in the world's oceans.
These creatures have been around for a half a billion years, at least, and such longevity certainly affords some evolutionary luxuries. Further, jellyfish could not only be considered to have attained a certain biological immortality, one type even re-emerging like a phoenix as a polyp from its own decomposing body, but also when faced with hard-times, hunger and starvation, jellyfish merely respond by shrinking (and in proportion) to a small-scale version of their former size, until food becomes available again.