Species catchword

In 2013, marine biologists Lisa-ann Gershwin and Peter Davie wrote about a new jellyfish, which they described in their research paper as "representing a new suborder within the Rhizostomeae." The species is very small in size - a reason the researchers believe it has been "previously mistaken" for juveniles of other species. The new species has been appropriately named with a catchword that indicates deception, and which has been popularised by a lead character of a popular sitcom. What's the name?

(Clue: A seven-stringed harp also shares the same name.)