Sacculina is a parasitic barnacle that infects crabs and alters its behavior. Its scientific name is a unique one, but there are some synonyms that can be used to refer to this organism. One of the most common synonyms used is "parasitic crab barnacle," as it highlights the parasitic nature of the creature and its habitat. Another synonym is "sacculinid barnacle," which denotes its taxonomical classification. It can also be referred to as "sacculinid parasitic isopod," highlighting the similarity to isopods despite belonging to a different class. Overall, even though "Sacculina" is the scientific name, there are multiple synonyms available to describe this unique organism.