The hunchback amphipod, Iphimedia gibba, is a species of amphipod crustacean. It is a marine arthropod in the family Iphimediidae. It was first described in 1955 by Keppel Harcourt Barnard as Cypsiphimedia gibba. Distribution This species is found off the South African coast from the Cape Peninsula to Port Elizabeth, from the subtidal down to at least . Description The hunchback amphipod is a small but conspicuous amphipod, not reaching more than in size. It is vividly striped in blue and yellow. It has blue sideplates. The body is hunched so that the head faces downwards. References Gammaridea Crustaceans described in 1940