HSwMS Spica (T121) is a former Swedish Navy Spica-class, torpedo-armed, fast attack craft (FAC), now a museum ship at the Vasa Museum in Stockholm, Sweden.

Three similar vessels were built by Karlskronavarvet.

The vessel was taken out of service in 1989 and made into a museum ship in her former home port of Karlskrona until 2002.

It was subsequently moved to the Vasa Museum.

It is a listed historic ship of Sweden.