Wuchang bream (Megalobrama amblycephala)

Theoretically yes; practically it's a pond fish. Megalobrama amblycephala reaches enormous adult size (profile figures 1.4–2 m, 2,000 L floor) as one of China's most important food fishes. The correct home setting is a garden pond: several cubic meters, good filtration, kept in a group. Any glass tank shortchanges it — the textbook case of 'don't keep livestock as pets'.

The name comes from its type locality — Wuchang, Hubei (today's Liangzi Lake area in Jiangxia, Wuhan). The famous poem line about 'eating Wuchang fish' made its reputation, but that fish is a culinary symbol, not a pet guide. It's a pillar of Chinese aquaculture with annual output in the millions of tonnes, positioned from start to finish as protein.

Herbivorous: aquatic plants, algae, pasture grasses (farmed stock get sudangrass and ryegrass), and formulated feed. Its long gut digests plant fiber — the fundamental divide from carnivorous species. Pond-care key: herbivores produce heavy waste; filtration and water changes must keep pace or eutrophication arrives fast.

Eurythermal — comfort zone 10–20 °C, tolerating summer warmth (below 28 °C) and winter chill (safe above 4 °C long-term). No heater needed; Yangtze-region ponds overwinter naturally. Keep winter water deep: 1.5 m+ for thermal buffering, and prevent total ice-over in small ponds.

Yes, commonly. Both are eurythermal large cyprinids with compatible diets (koi omnivorous, bream herbivorous) and gentle natures. Mixing notes: match sizes (big gaps invite suppression), keep density low, and size filtration seriously — two 5 kg fish out-pollute dozens of small tropicals. The classic Chinese garden-pond combination.

Very fast — an aquaculture sprinter: fry reach 0.5–1 kg in year one and market size (2–3 kg) in two. That growth means appetite, waste, and oxygen demand engineered to livestock scale, which small water simply cannot absorb. Once more: its stage is the pond, not the tank.

An oxygen signal. Large cyprinids burn oxygen heavily at night; muggy weather, algal blooms, and crowding cause pre-dawn gasping. Emergency: change water and start aeration immediately. Prevention: control density, stop overfeeding, run nighttime aeration in summer. If gasping comes with dark color and isolation, suspect water quality or parasitic gill disease.

Easy in season: males show thickened 'pearl' tubercles on the first pectoral ray and release milky milt under gentle pressure; females are soft and swollen with a slightly reddened vent. Off-season differences are subtle. Home pond-keepers rarely need this, though — spawning requires professional hormone technique, and pond fish seldom succeed naturally.

Three commonly confused Megalobrama relatives: Wuchang bream (M. amblycephala) has a small head and broadest 'balled' body with the dorsal origin behind the pelvic; triangular bream (M. terminalis) is more triangle-shaped with a bigger head; true bream (Parabramis pekinensis) is more laterally compressed with an even smaller head. Market 'Wuchang fish' sometimes covers all three. All good eating; Wuchang grows fastest with the best feed conversion.

In China it's a native farmed fish with no keeping restrictions. Two notes: don't release into natural waters — even native species from artificial stock can carry pathogens, and the Biosecurity Law explicitly regulates casual release; and stocking closed waters like reservoirs requires following local fishery rules. A food fish's terminus is the table, not the river.