Arnoglossus imperialis, the imperial scaldfish, is a species of flatfish from the family of left-eyed flounders, the Bothidae.

It occurs in the eastern Atlantic from Scotland south to Namibia, extending into the western Mediterranean.

[3][4] Arnoglossus imperialis ranges along much of the eastern Atlantic from Scotland south to Namibia,[5] including the Azores.

[1] Arnoglossus imperialis is found on sandy or muddy bottoms down to a depth of 350m,[3] it can also be found on substrates made of shell or coral[5] The major part of its diet is polychaete worms, although benthic crustaceans are probably also important.

[1] Off the coast of Portugal crustaceans of the order Mysidacea were the most important food item preyed on by A imperialis while an earlier study off northern France had found fish to be an important food, especially Callionymus lyra.