That may not be fotoshoped Some tropical beatles have larvae that size. That would be a case of ugly ducling kind of thing, as from that larva a increable beatle may emerge Think something like a giant rhinocerus beatle
For example But I personaly think it belongs to giant centaur beatle In the island of New Caledonia and on Fidji there are some that are really HUGE unfornatly they can already be on the brink of extinction
Same family. All the scarabeids have similar grubs, with the characteristic C shape.
Coura- are you referring to Xixuthrus heros? It is a cerambycid; their grubs are somewhat similar, but do not have the C shape and have annular welts on the body.