HMS Myrmidon was an Cormorant-class gunvessel of the Royal Navy

Royal Navy

The Royal Navy is the naval warfare service branch of the British Armed Forces. Founded in the 16th century, it is the oldest service branch and is known as the Senior Service...

, built at the Chatham Dockyard

Chatham Dockyard

Chatham Dockyard, located on the River Medway and of which two-thirds is in Gillingham and one third in Chatham, Kent, England, came into existence at the time when, following the Reformation, relations with the Catholic countries of Europe had worsened, leading to a requirement for additional...

 and launched on 5 June 1867.

Completed as a survey vessel, she commenced service on the North America and West Indies Station. She commenced service on the Australia Station

Australia Station

The Australia Station was the British—and later Australian—naval command responsible for the waters around the Australian continent.-History:In the early years following the establishment of the colony of New South Wales, ships based in Australian waters came under the control of the East Indies...

on 14 March 1885 and undertook hydrographic surveys along the Australian coastline until she left the Australia Station in 1888. She sailed to Hong Kong and was sold in April 1889 for £3000. Her fate is unknown.