Scyllarus arctus is a species of slipper lobster which lives in the Mediterranean Sea and eastern Atlantic Ocean.

[4] Scyllarus arctus is found throughout the Mediterranean Sea, and in eastern parts of the Atlantic Ocean, from the Azores,[3] Madeira and the Canary Islands as far north as the English Channel.

[5] The species is rare north of the Bay of Biscay; several specimens have been seen in British waters, but nonetheless, S. arctus is rarer in Britain than the giant squid, Architeuthis dux.

[7] S. arctus has among the smallest measured genome sizes in the Order Decapoda, at less than a third of that seen in the related genus Scyllarides.

[8] Scyllarus arctus is susceptible to white spot syndrome,[9] and is predated upon by a wide range of demersal fish.