CSS Squib, also known as CSS Infanta, was a Squib-class torpedo boat that served in the Confederate States Navy during the American Civil War. Squib was laid down in 1863, and was launched in early 1864. Her design was a form of launch armed with a spar torpedo. Initially serving on the James River as a flag of truce boat, she snuck into the Union Navy anchorage at Hampton Roads and attacked the steam frigate USS Minnesota early on the morning of April 9, 1864. Minnesota was damaged but not sunk, and Squib was able to escape back upriver. At an unknown time in mid-1864, Squib was moved by rail to the Wilmington, North Carolina, area, where she served on the Cape Fear River. Records of her service at Wilmington after November 1864 are not extant, but she may have resupplied a Confederate fortification during the Second Battle of Fort Fisher in January 1865. The next month, the Confederates withdrew from Wilmington, and Squib was scuttled off Cape Fear.

The Squib class torpedo boats were built for the Confederate States Navy during the later stages of the American Civil War. After the torpedo boat CSS David attacked and damaged the ironclad USS New Ironsides, the Confederates continued building torpedo boats with hopes of breaking the Union blockade. Four vessels of the class – CSS Hornet, CSS Wasp, CSS Squib, and CSS Scorpion – were constructed in Richmond, Virginia, in 1864. All were armed with a single spar torpedo and were powered by steam engines. Squib damaged the gunboat USS Minnesota in an attack on April 9, 1864, and was later sent to Wilmington, North Carolina, where she was scuttled in February 1865. The other three vessels of the class were all part of the James River Squadron and participated in the Battle of Trent's Reach on the night of January 23 and 24, 1865. Scorpion ran aground during the battle, and was forced downriver and out of control after the tender CSS Drewry exploded on January 24. She was later captured by Union forces and may have been burned. Hornet was sunk in a collision with another vessel on January 27, and Wasp was scuttled on the night of April 2/3, as the Confederates were abandoning Richmond.