Arethusa-class cruiser
As Arethusa class two classes of ships of the Royal Navy are called:
- Arethusa class ( 1913), a class of eight light cruisers, built 1912-1914 and used in World War I
- Arethusa class ( 1934), a class of four light cruisers, built 1934-1936 and used in World War II
- Disambiguation