Commmon Carp (Cyprinus carpio)
Current record: 64lb 6oz
Water: The Avenue, RH Fisheries
The common carp (Cyprinus carpio) is the backbone of UK coarse fishing, and for good reason: it grows big, fights hard, and tolerates water conditions that would put off far fussier species. Originally native to Asia, carp have been farmed and selectively bred for centuries, which is why you'll find several distinct strains stocked in UK waters rather than one uniform fish.
Common carp carry a full covering of scales and the classic torpedo shape. Mirror carp have patchy, irregular scaling, sometimes just a handful of large scales scattered across an otherwise bare body, and tend to be the strain most associated with big specimen fish. Leather carp have almost no scales at all, giving a smooth, rubbery appearance. All three are the same species, just bred for different looks over generations.
Carp are genuinely tough fish: comfortable in water from near-freezing to the mid-30s°C, tolerant of low oxygen (they'll gulp air at the surface if they have to), and able to survive a pond freezing over so long as some open water remains beneath the ice. They're schooling fish by nature, usually found in groups of five or more, and prefer slow or still water over soft, silty bottoms where there's cover and food.
Feeding is almost entirely opportunistic: aquatic plants, insects, crustaceans, molluscs, worms, even fish eggs. Most feeding happens at night and in the early hours before dawn, which is exactly why serious carp anglers often fish through the night rather than packing up at dusk.