Dubia vs. Discoid Roaches for Bearded Dragons: A Keeper's Head-to-Head
Dubia versus discoid is the comparison serious bearded-dragon keepers actually argue about, because unlike most feeder match-ups these two are genuinely close. Both are excellent staples. The honest truth is that the choice usually comes down to where you live, not to nutrition. Here's the head-to-head, with the marketing claims trimmed and the one big myth corrected.
Meet the two roaches
Dubia roaches (Blaptica dubia) are a soft-bodied feeder roach from Central and South America, 1.5–2 inches as adults. Males have full wings that lie flat; females are nearly wingless. They're docile, don't bite or jump, don't climb smooth walls, and breed prolifically.
Discoid roaches (Blaberus discoidalis) are a closely comparable tropical roach, about 1.5–2 inches with a flat, disc-like body that gives them their name. They too are non-climbing and ground-dwelling, soft-bodied, and hardy. (Heads up: discoids are constantly mislabeled as Blaptica dubia online — but that's the dubia's name. Discoids are Blaberus discoidalis.)
Two different species, very similar jobs.
Nutrition: nearly a wash
On the numbers that matter, these two are close enough that most keepers won't see a difference in their dragons:
- Protein: both run roughly 20% as-fed. Dubia sometimes test marginally higher, discoids sometimes marginally lower — a rounding error in practice. Either supports a growing juvenile well.
- Fat: comparable and moderate, in the 6–8% range, with dubia occasionally a touch higher. A leaner edge for discoids matters only at the margins, e.g., a sedentary adult prone to weight gain.
- Moisture: both around 60–70%, discoids sometimes slightly higher — a small hydration plus.
- Digestibility: both are soft, low-chitin, and easy to digest, with low impaction risk. This is a big shared advantage over crickets and especially mealworms.
The calcium myth, corrected
You'll read that dubia have a "favorable" or even "1:1" calcium-to-phosphorus ratio and that discoids are slightly worse. Don't make your decision on this. Both roaches are phosphorus-heavy, like nearly every feeder insect, and a dragon needs roughly twice as much calcium as phosphorus. The fix is identical for both: dust with a calcium supplement before feeding and run proper UVB so the dragon can absorb it. Lean on either roach for calcium and you're courting metabolic bone disease. The Merck Veterinary Manual's reptile nutrition overview is the clear, non-commercial reference on why calcium-plus-D3 is non-negotiable.
Bottom line on nutrition: pick either and your dragon does fine. This isn't where the decision lives.
Breeding and availability
Dubia breed fast — a mature female produces 20–40 nymphs a month — and ramp a colony to harvest sooner. That's their standout practical edge if you raise your own feeders.
Discoids breed at a more measured pace, so a colony takes longer to build and you may keep a larger one to match output. They're live-bearers too (no fragile egg cases), hardy, and easy to keep in a simple bin. If you want to run a discoid colony, my discoid keeping guide covers the whole setup, including the heat numbers that make or break production.
Availability cuts the other way in restricted regions: where dubia are banned, discoids are easier to source legally.
Legality: the real decider
Here's what usually settles it. Dubia roaches are restricted in Florida and regulated in some other places, because authorities treat them as a potential invasive species that could establish wild populations in warm climates. Discoids are widely accepted as the legal feeder alternative there. So:
- Where dubia are legal: either is excellent — choose on price, availability, and whether you want dubia's faster breeding.
- Where dubia are restricted (Florida especially): discoids win by default, and you give up almost nothing.
Always confirm your own state and local rules before ordering — regulations change, and a state agriculture department or university extension service is the right place to check.
A couple of smaller differences
- Allergies: dubia produce a fine frass dust that can bother sensitive keepers; discoids are often considered comparatively easier on allergies. If handling feeders makes you sneeze, that's a point for discoids (and wear gloves and use tongs either way).
- Activity: discoids tend to be a bit more active, which can help trigger the feeding response in a less enthusiastic dragon; dubia's calmer movement can suit a shy or very young dragon.
Clearing up a few myths
Both roaches attract the same tired misconceptions, worth correcting before they steer your choice:
- "Feeder roaches carry disease." From a reputable breeder, neither is dirtier than crickets or mealworms — usually cleaner, since they produce less waste. Wild roaches are a different animal entirely.
- "They'll escape and infest my home." Both are tropical insects that need consistent warmth and humidity to survive and breed; neither can establish in a typical house, and neither climbs smooth walls. An escaped feeder is a dead feeder.
- "They're hard to keep." Both are easier than crickets — simple bins, minimal space, low odor, no noise.
- "All roaches are nutritionally identical." Close, but not exact: dubia tend slightly fattier (handy for an underweight dragon), discoids slightly leaner (handy for a sedentary one). Minor, but real.
Quick comparison
| Factor | Dubia roach | Discoid roach |
|---|---|---|
| Protein (as-fed) | ~20%+ | ~20% |
| Fat | Moderate (~7–10%) | Moderate (~6–8%) |
| Calcium:phosphorus | Phosphorus-heavy — dust | Phosphorus-heavy — dust |
| Digestibility | Soft, low chitin | Soft, low chitin |
| Breeding speed | Faster | Slower |
| Climbing | No | No |
| Legality | Restricted in FL & some areas | Widely keepable |
Cost efficiency over time
Both are affordable, especially in bulk, and both become nearly free if you breed your own. The differences are at the edges. Dubia's faster reproduction means a colony pays you back sooner, which is a genuine advantage if you're feeding a collection. Discoids breed slower, so the colony takes longer to reach the same output and you may run it a bit larger — but they're just as cheap to feed (produce, grain, scraps) and just as hardy. In dubia-restricted regions, discoids can cost a little more to buy simply because supply is thinner, but breeding your own erases that over time. For most keepers the long-run cost is a wash, and convenience and legality matter more.
Feeding amounts by life stage
Whichever roach you choose, the schedule is driven by age, not species:
- Hatchlings (0–4 months): high protein, fed often — small roach nymphs 2–3 times a day, sized no larger than the space between the eyes.
- Juveniles (4–12 months): slightly larger roaches, roughly twice a day, adjusting to what's eaten in a 10–15 minute window.
- Adults (1 year+): mostly greens, with roaches only 2–3 times a week as the protein share.
Offer roaches mid-morning after the dragon has basked so it can digest, dust with calcium, and feed in a dish or with tongs to prevent escapes and stress. If live roaches are routinely left uneaten, that's a sign of overfeeding or that something in the setup needs attention.
Handling and storage
Keep either species in a sturdy, well-ventilated bin with a secure lid, egg flats or cardboard for hiding and surface area, and a no-drown water source. Dubia like it warm (85–95°F / 29–35°C); discoids breed best in a similar warm range. Offer produce and a dry food, remove uneaten food and waste before it molds, and keep the bin out of direct sun and temperature extremes. Handle gently — both are delicate — and use tongs or gloves if you'd rather not touch them, which also helps if dubia frass dust bothers you.
How to feed either one right
The routine is the same regardless of which you pick:
- Source clean roaches raised for reptile feeding — never wild-caught. All Angles Creatures stocks healthy discoid roaches in nymph through adult sizes.
- Gut-load for 24–48 hours with leafy greens, carrot, and squash.
- Dust with calcium before feeding; add a multivitamin on a lighter schedule.
- Size correctly — no larger than the space between the dragon's eyes.
- Portion by age — juveniles eat protein daily; adults take insects a couple times a week, with greens as the bulk.
Switching between the two is painless: mix the new roach in with the familiar one and shift the ratio over a few feedings.
My verdict
Treat dubia and discoids as interchangeable on nutrition and decide on legality and logistics. In dubia-legal areas, pick whichever is cheaper and easier to get — dubia's faster breeding is a real plus if you raise your own. In dubia-restricted areas like Florida, discoids are the obvious, fully capable choice. Either way, the thing that actually keeps your dragon healthy isn't which roach you chose — it's dusting with calcium, running good UVB, sizing correctly, and keeping variety in the diet.
Want the broader feeder picture? See why discoid roaches are one of the best feeders, or browse the full exotic animal care library.