Dogfish sailed out of New London, Connecticut, on local duties and cruised to the Caribbean Sea and Bermuda to conduct training.

She was overhauled and extensively modernized at the Philadelphia Naval Shipyard from August 1947 to April 1948, and then served in experimental projects as well as normal operations at New London.

From 31 October to 19 November 1948 she took part in large-scale fleet exercises ranging from the waters off Florida to Davis Strait between Labrador and Greenland.

On 8 November, she stood by and fought the fires on the trawler Agda during local operations out of New London.

She cruised to Faslane Bay in Scotland between 31 January and 12 April 1958 to evaluate new equipment, and from 23 May to 8 August 1959 served in the Mediterranean Sea.