A globster is a blob. It's an organic mass that has been washed ashore from some body of water, usually the ocean but occasionally it happens at a lake. Some of these globsters have identifiable structures such as fins, bones, tentacles, eyes or some other features that can narrow down the particular species of animal that it is.
The term globster was coined in 1962 by naturalist and cryptozoologist Ivan T. Sanderson. Sanderson was one of the originals in the field of cryptozoology and he has written extensively on the subject of cryptozoology and animals in general.
When these globsters are first discovered they are often seen as sea monsters by passersby. Unless, of course they see a tentacle then they are identified as a giant squid or giant octopus. Perhaps they are seen as decomposing whale if a fin is sighted.
After professionals are called in and if they are able to identify the globster they usually see it as a Basking shark. Seldom do they make any other proclamation. The basking shark is the second largest fish, the largest being the whale shark. The Basking shark is found in all the temperate waters of the world. The largest Basking sharks have been pegged at just over 40 feet long. However the average size is about 20 26 feet long.
The odd thing about the Basking shark is the way their corpses decompose. The rotting corpse of the Basking shark has been known to take some odd shapes. It has apparently been able to take the shape of a plesiosaur and other globular mess shapes. However, not all Cryptozoologists accept that every globster is a Basking shark.
If not a Basking shark then what? This has led to much speculation. Could globsters be a kind of gigantic shark that lives deep in the ocean and after its death comes floating to the surface? So that by the time they had been discovered they had decomposed so badly that they have become unidentifiable. There are a number of potential sharks from pre-history but one of the favorites might be Megalodon.
There are reports of globsters going back more than 100 years. It is certain that globsters washed up prior to that but were called various things. It is certain that the globster helped the myth of the sea serpent grow. If sailors were to find a globster it would surely add to their speculation about weird creatures out in the oceans.
Globsters, at least a small number, continue to confound the experts. Cryptozoologists love that because they can read almost anything into those globsters that have yet to be fully identified. It might still be a number years before globsters can be truly identified until then Cryptozoologists will revel in the speculation.