Harpagifer bispinis, the Magellan plunderfish, is a species of ray-finned fish within the family Harpagiferidae.

[2][3] Harpagifer bispinis is a demersal fish, mainly inhabiting shallow inshore waters up to 50 meters below sea level, often occurring in tide pools, under rocks, and among kelp feeding on small crustaceans.

[3] Females guard eggs that are deposited in a nest constructed for a 4 month incubation period.

[3] Harpagifer bispinis has been classified as a 'Least concern' species by the IUCN Red List as despite its small range, it is common and abundant with no known major threats.

It may be consumed by the Chinook salmon which is invasive within its range, however this is not thought to be a major threat to the species population.