Can Crested Geckos Eat Superworms? Safety, Prep & Frequency
Safe — OccasionallyFeeding frequency: monthly
Superworms are safe for adult crested geckos in strict moderation—no more than once or twice a month—because their high fat content (~17% dry weight) and severely phosphorus-skewed Ca:P ratio (~1:18) make them a nutritional liability as a staple. Always gut-load and dust with calcium + D3 before offering.
How to Prepare
- Source superworms from a reputable feeder-insect supplier to minimize pesticide and pathogen exposure.
- Gut-load for 24–48 hours on calcium-rich greens (collard greens, dandelion greens, squash) to improve the nutrient profile transferred to your gecko.
- Dust each worm with a calcium + D3 supplement powder immediately before offering—never skip this step given superworms' poor Ca:P ratio.
- Select worms no wider than the space between your gecko's eyes to eliminate choking and impaction risk.
- Offer in a smooth-sided dish so worms cannot burrow or bite while your gecko hunts; remove any uneaten worms within 15–20 minutes.
Warnings
- High fat content (~17% dry weight) accelerates obesity and hepatic lipidosis (fatty liver disease) if fed more than twice a month.
- Superworms have strong mandibles and will bite—always supervise feeding sessions and never leave worms loose in the enclosure overnight.
- The Ca:P ratio of roughly 1:18 is among the worst of common feeder insects; calcium dusting is non-negotiable, not optional.
- Juveniles under 10 g body weight should not be offered superworms—size mismatch raises impaction risk and the fat load is excessive during rapid growth phases.
- Freshly molted (white/soft) superworms have a temporarily altered nutritional profile; avoid feeding them at this stage.
Nutrition Facts
| Calcium:Phosphorus ratio | ~1:18 (very phosphorus-heavy) |
| Crude protein (dry weight) | ~17–19% |
| Crude fat (dry weight) | ~17–18% |
| Moisture | ~58–60% |
FAQ
- Are superworms safe for baby crested geckos?
- No. Hatchlings and juveniles under 10 g should not receive superworms. The worms are too large relative to the gecko's skull, creating a real impaction hazard, and the high fat content is especially problematic during growth phases when lean protein is a priority. Small crickets or appropriately sized dubia roaches are the correct choice until your gecko reaches adult weight (around 35–45 g).
- How often can crested geckos eat superworms?
- Once or twice per month is the widely accepted upper limit among reptile veterinarians and experienced keepers. Because superworms run roughly 17–18% fat on a dry-weight basis, more frequent feedings rapidly raise the risk of fatty liver disease. The majority of live-insect feedings should consist of lower-fat staples such as crickets or dubia roaches, supplemented with a commercial crested gecko diet (CGD).
- Do superworms need to be gut-loaded before feeding?
- Yes—gut-loading is mandatory, not optional. Superworms purchased from a supplier have little nutritional value in their digestive tract at the time of purchase. Loading them on calcium-rich greens for 24–48 hours substantially improves the nutrients passed to your gecko. Pair gut-loading with calcium + D3 dusting to partially counteract the worm's naturally poor Ca:P ratio.
- Can superworms injure a crested gecko?
- Yes. Zophobas morio (superworms) have notably strong mandibles and will actively bite if not consumed quickly. Always feed in a smooth-sided dish, supervise the session, and remove uneaten worms within 15–20 minutes. Unsupervised superworms left in an enclosure have caused documented bite wounds, particularly around the gecko's limbs and face.
- What feeder insects are better everyday options?
- Crickets and dubia roaches are the standard staple live feeders for crested geckos—both carry lower fat and a more favorable Ca:P ratio than superworms. Most keepers additionally rely on commercially formulated CGDs (Pangea, Repashy) as the dietary backbone, using live feeders purely for enrichment. See the full breakdown in the crested gecko diet guide linked below.