First Lord, First Sea Lord, and Admiralty roles

Is there both a First Sea Lord and a First Lord of the Sea?

The political First Lord of the Admiralty and naval Sea Lords were different offices, while titles varied by period.

The First Lord of the Admiralty, normally a political office represented in Parliament, was distinct from the professional naval Sea Lords. Winston Churchill's service as First Lord is the familiar example of the political side of this arrangement. The senior naval title has varied across periods, which explains references that appear to reverse or rearrange the same words. The separate office of Lord High Admiral also changed in practical authority according to the period and officeholder. The terminology records changing civil-military institutions rather than several simultaneous officers with nearly identical jobs.