HMS Colossus was a 74-gun third-rate ship of the line of the Royal Navy, launched from Deptford Dockyard on 23 April 1803.

[1][3] On 27 August 1803 Colossus recaptured the East Indiaman Lord Nelson, which the French privateer Belone had captured two weeks before and which Seagull had fought to the point of surrender.

Towards the end of the exchange of fire between the two ships, Captain Morris was hit by a shot from one of Argonaute's guns, just above the knee.

Argonaute broke free from Colossus after this, whilst the British ship was engaging both Swiftsure and the Spanish Bahama, 74, on her other side.

[4] On 5 January 1813 Colossus, the frigate Rhin and the brig Goldfinch captured the American ship Dolphin.