Wivern was a powerful ironclad turret ship ordered by the Confederate States Navy in 1862 as CSS Mississippi. While under construction at Laids, Birkenhead, England, she was given a false identity as an Egyptian ship named El Monassir. The British government saw through this deception and seized the ship in 1863. The former CSN ironclad was taken into the Royal Navy, commissioning in 1865. Wivern was distinguished from her sister HMS Scorpion by the struts on her masts, which made her the first warship with tripod masts.

Wivern's seagoing career was short, as warship technology was advancing rapidly. By 1868 she was reduced to duty as a guardship, with a decade in reserve followed by 14 years as a guardship at Hong Kong. She was hulked in 1904 and sold in 1922.

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