Starfish first appeared in the fossil record in the Cambrian. The first known asterozoans were the Somasteroidea, which exhibit characteristics of both groups. Starfish are infrequently found as fossils, possibly because their hard skeletal components separate as the animal decays. Despite this, there are a few places where accumulations of complete skeletal structures occur, fossilized in place in Lagerstätten — so-called "starfish beds". By the late Paleozoic, the crinoids and blastoids were the predominant echinoderms, and some limestones from this period are made almost entirely from fragments from these groups. In the two major extinction events that occurred during the late
Starfish Project Starfish Project The Starfish Project is a UK-based not-for-profit therapy programme which helps people who stammer or stutter to overcome their speech through the use of diaphragmatic breathing (also known as "costal breathing"). The programme also teaches participants to reassess negative emotions surrounding their stammering through the use of avoidance reduction therapy (see stuttering therapy). Participants attend a three-day residential course near Hailsham in the UK during which a diaphragmatic breathing technique and non-avoidance strategies are taught. Following this initial course, participants are able to attend additional follow-up courses at the same venue without charge from the Starfish Project as