Feeding a Chinese water dragon: from insectivorous juvenile to omnivorous adult
The Chinese water dragon's (Physignathus cocincinus) diet shifts with age: heavily insectivorous as a juvenile, it opens up to a little fish and greens as an adult. Poorly dosed calcium-D3 supplementation exposes this fast-growing lizard to metabolic bone disease, a widely documented condition in captive reptiles (research on Google Scholar). Find our other pointers in the food section.
The juvenile: near-exclusively insectivorous
Crickets, roaches and appropriately sized worms make up most of a young, fast-growing water dragon's meal. Prey must stay proportioned to its mouth to avoid regurgitation, and calcium-D3 supplementation should accompany nearly every meal at this stage.
The adult: a bit more fish and greens
As an adult, the diet stays mostly insectivorous but broadens with occasional fish (never as a staple) and some fresh greens. This diversification limits food boredom and mirrors the opportunistic diet seen in the wild, where the species lives near water and hunts whatever it finds.
Calcium and D3: never improvised
Regular calcium-D3 supplementation is non-negotiable, especially if the terrarium's UVB isn't flawless. Our guide on dosing calcium and vitamins for reptiles details frequencies by age and prey type.
Varying prey to avoid selectivity
A water dragon always fed the same insect can become selective and refuse anything new. Alternating crickets, roaches and worms, and occasionally changing feeding spots in the enclosure, keeps feeding interest up without complicating the routine. See our Chinese water dragon profile for its full picture.
Frequently asked questions
Do adult water dragons really eat fish?
Yes, as an occasional supplement, never as the base of a diet that stays mostly insectivorous.
Should prey be varied?
Yes: alternating crickets, roaches and worms limits the food selectivity that easily sets in when an animal is always fed the same thing.
What happens with poor supplementation?
Metabolic bone disease, particularly serious in this fast-growing, large-bodied adult species.
This guide is part of Planète Pets’s Reptiles universe. Our advice is general in nature: for any health concern, your veterinarian remains the only reference.