A globster is an unidentified carcass washed up on the shore of an ocean or other body of water, or found in the stomach of a whale. In the past these were often described as sea monsters, and myths and legends about such monsters may often have started with the appearance of a globster.
Many globsters (such as the famed Zuiyo Maru corpse) have initially been described as dead plesiosaurs, although they later turn out to be the decayed carcases of basking sharks. These mistaken identifications are due to the lower jaw and lower tail lobe of the shark decomposing first, giving the remainder a long-necked, thin-tailed appearance when discovered. Another common explanation — as with the "Chilean blob" of 2003 — is that many are large amounts of whale blubber which have been released from decaying whale corpses. Still others are unexplained. Giant and colossal squid may also explain some globsters, particularly those which are tentatively identified as monster octopuses.
Some Globsters are supposed to be the victims of pathological skepticism, because the scientific community has refused to look at them until after they have decomposed too much to ever possibly be good enough as evidence for a new species, or has outright destroyed them, as happened with the most famous caddy globster, found in 1937.
In the 2004 book Der Svwarm or The Swarm by Frank Snatczing, globsters are proclaimed to be another intelligent life form, known as the Yrr.