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 site Starfish site Starfish sites were large-scale night-time decoys created during the Blitz to simulate burning British cities. The aim was to divert German night bombers from their intended targets so they would drop their ordnance over the countryside. The sites were an extension of Colonel John Turner's decoy programme for airfields and factories (code named "Q" Sites). Following the bombing, and near destruction, of Coventry in November 1940, Turner was tasked with creating decoys for seven major cities. Turner referred to the new sites as "Special Fire" or "SF". However, one early site (near Bristol) was given the name "Starfish",