Barnacle (slang) in the field in order to correct a design or manufacturing defect. The term appears to have originated from the crustacean barnacle which is an animal that attaches itself to rocks, docks, ships, whales, and other objects where it grows. A barnacle in electronics is something added to the manufactured product. Typically a barnacle on a circuit board is very noticeable, much like the mollusc variety on a rock in the sea. While the term was originally used with electronic hardware, it has also migrated into the software industry where is it is used to describe software that is added
Whale barnacle The goose barnacle "Conchoderma auritum" often attaches to the shell of "C. diadema". Whale barnacles and whales have a commensal relationship–the barnacle benefits at no benefit nor cost to the whale. However, callosities could be an adaptation to prevent barnacles from adding to drag by concentrating infestations, and a heavy infestation may lead to eczema. "Xenobalanus" can more easily grow on sick skin with a weakened immune system, and younger individuals tend to have larger infestations presumably because they are less resistant; further, given it has a stalk, it increases the drag felt by the host and may be considered