Amphibalanus is a genus of barnacle of the family Balanidae that includes species formerly assigned to Balanus. It contains the following species: * Amphibalanus amphitrite (Darwin, 1854) * †Amphibalanus caboblanquensis (Weisbord, 1966) (extinct) * †Amphibalanus caribensis (Weisbord, 1966) (extinct) * Amphibalanus cirratus (Darwin, 1854) * Amphibalanus eburneus (Gould, 1841) * †Amphibalanus halosydne (Zullo & Katuna, 1992) (extinct) * †Amphibalanus hopkinsi (Zullo, 1968) (extinct) * Amphibalanus improvisus (Darwin, 1854) * Amphibalanus inexpectatus (Pilsbry, 1916) * Amphibalanus peruvianus (Pilsbry, 1909) * †Amphibalanus playagrandensis (Weisbord, 1966) (extinct) * Amphibalanus poecilotheca (Kruger, 1911) * †Amphibalanus reflexus (Zullo, 1984) (extinct) * Amphibalanus reticul