Metamorphosis Candidate is a term used to describe an organism that undergoes a transformation from one stage of life to another. The term is often used in reference to the LARVA, which is a five letter word that describes the immature form of an insect or other invertebrate. This stage of life is characterized by rapid growth and development, and is followed by a pupal stage before the organism reaches adulthood. Metamorphosis Candidates are organisms that have the potential to undergo this transformation and reach adulthood.