Custom vivarium, min ~120x60x180cm (4x2x6ft, 6ft tall); bigger better
Social needs
Solitary safest; never two males
Diet
Insectivore/carnivore, minor plant matter
Time
High - daily misting, water care
Cost
High
Overview
The Chinese water dragon is a glossy green, semi-aquatic agamid from the forested riverbanks of Southeast Asia, spending its life climbing branches above water and diving in when alarmed.
Males reach about 90cm (3ft) and females 60-75cm, though roughly two-thirds of that length is tail, and adults are crested, long-limbed and strikingly iguana-like.
Despite the shared name, it is nothing like a bearded dragon: it needs tropical humidity, real vertical height and a swimming pool rather than a hot, dry desert tank.
Juveniles are sold cheaply at 20-25cm, which hides the fact that a healthy adult lives 10-15 years (sometimes to 20) and needs a custom room-corner enclosure with filtered water.
This is an advanced-keeper species.
Many on the market are still wild-caught imports arriving stressed and parasitised, so seek out a captive-bred animal from a reputable breeder and expect to build its home yourself.
Housing
An adult needs a tall, custom-built enclosure.
A widely cited minimum is about 120x90x180cm (4x3x6ft), with the 180cm (6ft) height being the non-negotiable part, and both more floor space and more height are always better.
A standard off-the-shelf 4ft vivarium is far too small, its lack of height alone ruling it out, so most keepers commit to a room-corner build.
Fill that height with sturdy diagonal branches, cork trunks and dense live or artificial foliage, since these lizards perch above water and feel exposed without cover.
A large water feature the dragon can fully submerge and swim in is essential, not optional, and should cover a substantial part of the floor.
They routinely defecate in their water, so it needs aquarium-grade filtration or a full change every day to prevent skin and gut infections.
Keep a basking surface of 32-35C (90-95F), warm daytime ambients of 27-30C and a cooler end around 24-26C, with a night drop that may fall to 21-24C (70-75F) but no lower.
Hold humidity at 70-80% through twice-daily misting or an automatic mister plus the large water surface, and run strong UVB across the basking zone, using a high-output T5 tube of roughly 6% (Ferguson Zone 3) positioned so the dragon basks about 25-30cm from it.
Cover or visually break up the lower glass, because water dragons do not perceive glass as a barrier and will rub and ram their snouts against it.
Diet
Chinese water dragons are primarily insectivores, taking a varied rotation of gut-loaded dubia roaches, crickets, locusts, earthworms and black soldier fly larvae, with silkworms and hornworms as excellent lower-fat additions.
Adults can also take the occasional vertebrate item such as a pre-killed pinky or fuzzy mouse, but these are rich treats rather than staples, and feeder fish should be offered only sparingly because many species carry thiaminase and parasites.
Dust insects with calcium at most feedings and with a vitamin D3 supplement on a schedule, as this species is as vulnerable to metabolic bone disease as any diurnal basking lizard.
A small amount of finely chopped greens and fruit can be offered and is sometimes eaten, but plant matter is a minor part of the diet, unlike in a bearded dragon.
Feed juveniles daily and adults every two to three days, adjusting for body condition.
Overfeeding rodents, waxworms and superworms produces obese, short-lived dragons.
Health
The signature injury of this species is rostral damage: snout rubbing and nose-ramming against glass in undersized or poorly screened enclosures, leading to abrasions, jaw swelling and bone infection.
It is so common in small tanks as to be near-universal, and the fix is space, visual barriers and planted cover, not ointment.
Metabolic bone disease from inadequate UVB and calcium, respiratory infections from cool or dry conditions, and skin and tail infections from standing in fouled water are the other major killers.
Wild-caught imports frequently carry heavy parasite loads, so a faecal exam with an exotics vet should follow any purchase.
Females can produce infertile eggs without a mate and need a deep, warm lay box of moist sand-soil to avoid fatal egg-binding.
Watch for a dull, brownish cast to the skin, sunken eyes or a kinked tail base, and find a reptile-experienced vet before you need one.
Temperament
Chinese water dragons are gentler and more tractable than green iguanas, and with slow, consistent, ground-up interaction many become calm enough to hand-feed and perch on an arm.
Taming takes months of patience, and forcing handling on a new or wild-caught animal teaches it only fear.
They are fast, flighty prey animals whose escape reflex is to leap, sometimes straight at glass, so interaction is safest inside or directly at the enclosure rather than loose in a room.
Their claws are sharp from climbing, and the tail can be lashed or broken and does not regrow.
Males must never be housed together and will fight seriously, and even a male seeing his own reflection may attack the glass.
A single dragon is the safest arrangement, with female groups possible only in very large, experienced setups.
A good fit for
Experienced keepers ready to build a custom enclosure
Those wanting a gentler alternative to a green iguana
Fans of planted, bioactive, high-humidity vivariums
Keepers home daily for misting and water changes
People who enjoy slow, patient taming work
Common mistakes to avoid
Snout-rubbing injuries are near-universal in small glass tanks
No off-the-shelf vivarium is big enough for an adult
Swimming water fouls daily and needs filtration or full changes
Many for sale are wild-caught and heavily parasitised
Needs the opposite of bearded dragon care despite the name
Cheap juveniles hide a 6ft-enclosure, 15-year commitment
Most reptile emergencies are husbandry emergencies first. Before you panic, check the temperatures — but check them with a thermometer, not a hand.
Go now
Open-mouth breathing, or bubbles and mucus at the nose or mouthGo now. Raise the warm end to the top of the species range in transit. Respiratory infection in a reptile is usually already established by the time it is visible, and it advances fast at the wrong temperature.
Now
Prolapse — any tissue protruding from the ventGo now. Keep the tissue moist with clean lukewarm water. Do not push it back in. Exposed tissue dries and dies quickly, and the window for a simple repair is short.
Now
Gaping, gasping, or unable to right itself when gently turned overGo now. Loss of the righting reflex signals a neurological or metabolic crisis.
Now
A burn, or a blackened patch on the belly or sideGo now, and unplug the heat source before you leave. Contact burns from an unregulated mat or an unguarded lamp are among the most common injuries in captive reptiles.
Now
Today
Tremors, twitching, jerky limbs, or a rubbery jawCall today. Note your UVB bulb type and when it was last replaced. Almost always a calcium and D3 problem, and almost always a UVB problem underneath that.
Today
Retained shed over the eyes, or a ring of stuck shed on the tail or a toeRaise humidity and offer a damp hide, then call if it is not clear within a day. A constricting ring cuts off circulation and the digit or tail tip is lost.
Today
Sudden weight loss, or a visibly sunken or triangular body shapeCall today, with the weight history. A reptile that has lost condition has usually been unwell for a while.
Today
Soon
Refusing food beyond the species' normal fastCheck what a normal fast looks like for this species before worrying — for several snakes it is weeks, not days. Then log it and book if the fast is unusual for this animal. Feeding anxiety drives more unnecessary vet visits than any other reptile question, and also masks the fasts that genuinely matter.
Check the guide first
Before any non-emergency call, write down the four numbers a vet will ask for: the thermostat probe reading, the warm-end air temperature, the cool-end air temperature, and the hottest accessible surface. Surface temperature can run well above the air above it.
This is general guidance for a healthy adult, not a diagnosis. An exotics vet who knows your animal always overrides it — and the time to find one is before you need one.
Can a chinese water dragon eat that?
Reptile diets split hard by species. An insectivore and a grazing tortoise share almost nothing, so check the species guide as well as this list.
Never (15)
AlcoholNo safe amount at any body weight on this site.
never
AvocadoPersin. Fatal to many reptiles.
never
CaffeineCoffee, tea and energy drinks. Cardiac and neurological toxicity at tiny doses for an animal this size.
never
ChocolateTheobromine and caffeine. Small mammals and reptiles cannot clear either.
never
CitrusToo acidic, and it interferes with calcium absorption.
never
Dog or cat foodProtein and vitamin D levels formulated for a mammal. In tortoises it causes irreversible kidney and shell damage.
never
FirefliesLucibufagins. A single firefly has killed adult lizards. This is the most dangerous item on any reptile list and it is the one keepers do not know about.
never
Fish caught from the wildThiaminase and parasite risk for turtles and aquatic species.
never
GarlicSame allium toxicity as onion, and more concentrated by weight.
never
Iceberg lettuceWater with no nutrition. It fills a reptile up in place of food that would have done something.
never
LeekAllium family. Same mechanism as onion and garlic.
never
OnionOrganosulphur compounds damage red blood cells. The whole allium family is out.
never
RhubarbOxalate load high enough to cause acute kidney injury.
never
Salty or seasoned human foodSalt, oil and seasoning. Crisps, chips, seasoned leftovers and processed meat are all out.
never
Wild-caught insectsPesticide residue and parasites, and the identification risk. Captive-bred feeders only.
never
Rare treats (1)
WaxwormsVery fatty. Useful for a underweight animal or for medicating, addictive otherwise. One or two, rarely.
rare treat
Occasional (5)
Bell pepperSafe, low oxalate, and the colour gets a refuser eating. A few small pieces a few times a week.
occasional
Butternut squashWell tolerated and a useful source of vitamin A precursors. Small cubes a few times a week.
occasional
KaleGood calcium, mild goitrogen. Rotate it. Twice a week.
occasional
MealwormsHard chitin shell and a poor calcium ratio. Fine as part of a varied feed, poor as the whole diet. A few, alongside better feeders.
occasional
SpinachOxalates bind dietary calcium, which is the last thing a reptile at risk of metabolic bone disease needs. A very small amount, rarely.
occasional
Everyday foods (6)
Black soldier fly larvaeUnusually high in calcium; one of the few feeders that does not need dusting. Several per feed.
everyday food
Collard greensOne of the best staple greens for herbivorous and omnivorous reptiles. Daily.
everyday food
CricketsA standard feeder. Gut-load them for 24 hours before offering, or you are feeding an empty shell. Sized no wider than the space between the animal's eyes.
everyday food
Dandelion greensExcellent calcium-to-phosphorus ratio and readily taken. Pick away from sprayed ground. Daily, for herbivorous species.
everyday food
Dubia roachesBetter calcium ratio and more meat per insect than crickets, and they cannot climb glass. Sized to the animal.
everyday food
Mustard greensGood calcium ratio; rotate with other greens. Several times a week.
everyday food
That food is not on our list. Reptile diets are narrower than they look — check the species guide, and ask an exotics vet before offering anything unfamiliar.
Dust feeders with a calcium supplement to the schedule in the species guide. A reptile can be eating well and still be starving of calcium.
Setup, monthly, first year and across a whole life, itemised and with the electricity worked out from the actual wattage. Published figures for the same animal disagree by a factor of four, so the calculator shows ranges rather than picking one.
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