The USS Penguin definitely did not have a very warlike name. The word penguin just doesn't strike fear into anybody.
From Civil War Navies 1855-1883.
The USS Penguin was built at Mystic, Connecticut, and launched 26 November 1859. It weighed 389 tons and had one screw for propulsion and an Ericsson (designer of the USS Monitor) capable of ten knots. The crew numbered 69.
It served in the North Atlantic Blockading Squadron in August 1861, when it sank the aforementioned blockade runner Louisa. In October 1861, it was transferred to the Potomac Flotilla.