Crocodile Gecko Care: Breeding, Bioactive Setup & Morphs

Maybe you already have a leopard gecko rack. Maybe you're running a crested gecko colony too. If so, you've probably hit a wall with most "advanced" care sheets.

They give vague humidity ranges. They skip breeding data. They never mention morphs or genetics.

The crocodile gecko (Tarentola mauritanica) fixes that gap. Some keepers call it the Moorish gecko or wall gecko. It gets the "crocodile" nickname from its tough, bumpy scales — they look like tiny armor plates.

This hardy, long-lived Mediterranean species suits keepers who already know the basics. It's a great pick if you want to go deeper on breeding, bioactive design, and health care.

Quick Answer: Crocodile geckos need a 75-85°F basking gradient and 50-60% humidity with a daily dry-down. Give a trio a vertical enclosure at least 18x18x24 inches. They lay 2 eggs every 4-6 weeks in season. Eggs hatch in 55-70 days at 82-86°F. There's no fixed morph market yet — color variation comes from locality, not selective breeding.

What Exactly Is a Crocodile Gecko?

"Crocodile gecko" means Tarentola mauritanica — not the red-eyed crocodile skink. Mixing up these two names causes most of the bad care advice online.

Both animals share rough, bumpy skin. But they come from totally different climates and need opposite humidity levels.

Crocodile skinks live in humid rainforests. Crocodile geckos live on dry walls and rocks across Spain, Portugal, Italy, and North Africa [1]. That mix-up sends beginners searching for rainforest humidity numbers for a Mediterranean animal.

Adult crocodile geckos grow to 5.5-6 inches long. They can live 8-10 years in captivity with good care. They're nocturnal and get territorial as adults.

They also chirp and click. Leopard gecko keepers will recognize the sound, but crocodile geckos are noticeably louder.

How They Differ From Species You Already Keep

Coming from crested or gargoyle geckos? Cut your humidity expectations in half. Crocodile geckos like much drier conditions than crested geckos or gargoyle geckos.

• Substrate moisture: dry-to-moderate, not always damp
• Climbing style: flat and wall-hugging, not branch-gripping like crested geckos
• Vocalization: louder and more frequent chirping than leopard geckos

Common Myth: "Crocodile geckos need the same high humidity as crocodile skinks because of the name." Reality: Tarentola mauritanica comes from dry Mediterranean scrub and rock walls, not rainforest. Too much humidity for too long can cause breathing problems in this species [1].

Bioactive Setup: The Exact Numbers You Need

A bioactive crocodile gecko tank needs a 3-4 inch substrate base. It also needs a dry-to-humid gradient. Pick isopods built for dry conditions — not the tropical mix you'd use for crested geckos.

Use an 18x18x24 inch vertical enclosure at minimum for a trio (one male, two females). Crocodile geckos hug walls, so vertical climbing space matters more than floor space. Cork bark flats and rough slate work better than smooth branches.

Check out our bioactive terrarium starter kit before you buy anything piece by piece — it bundles the drainage layer, mesh, and substrate in one order.

Substrate and Drainage Layer

Build your base the way you would for any dry bioactive setup:

1. Drainage layer: 1.5-2 inches of expanded clay pebbles or lava rock
2. Substrate barrier: fine mesh screen to stop substrate falling into the drainage layer
3. Substrate mix: coco fiber, sand, and crushed leaf litter — keep it mostly dry with one damp corner
4. Depth: 3-4 inches total, similar to what reptifiles recommends for impaction-safe lizard substrates [2]

Cleanup Crew Selection

Skip the humidity-loving isopods you'd use for a crested gecko tank. Use Porcellio scaber ("common rough" isopods) and desert-adapted springtails. Both handle the drier substrate zones crocodile geckos like.

Pro Tip: Keep a spare culture tub of Porcellio scaber running year-round. This way, you won't cross-contaminate cleanup crews between your humid crested gecko bins and this drier crocodile gecko build.

Temperature and humidity numbers matter more than vague "keep it warm and humid" advice. Run a basking spot of 85°F, an ambient of 75-80°F, and a night drop to 65-70°F. Humidity should sit at 50-60% after a daily light misting.

Then let it dry down to 35-40% within a few hours. This mimics the wet-then-dry rock crevices of their native range [3].

A digital thermometer and hygrometer combo lets you track both gradients without guessing. Pair it with a low-output 2-6% UVB bulb like this compact UVB kit. Even nocturnal geckos need some UVB for vitamin D.

More keepers adopted this practice through 2026, after ARAV-affiliated vets pushed for UVB use across nocturnal species.

Feeding Crocodile Geckos

Crocodile geckos eat insects — crickets, roaches, and mealworms sized to fit between their eyes. Feed adults every two to three days. Feed juveniles daily, since they're growing fast and need more calcium and protein.

Dust every meal with calcium powder. Add a multivitamin dusting once a week.

Breeding Crocodile Geckos

Breeding crocodile geckos takes patience, but the protocol is simple once you know the numbers. Start with a healthy trio: one male and two females, each at least two years old and over 5 inches long.

Cool the enclosure to 65-68°F for six to eight weeks in winter. This brumation period triggers breeding behavior once temperatures rise again in spring.

After warm-up, watch for courtship: head-bobbing, tail waving, and gentle biting at the neck. A gravid female will look visibly rounder within two to three weeks of pairing.

Females lay 2 eggs every 4-6 weeks through the breeding season, which runs roughly March through September. She'll stick the eggs to a hard surface — cork bark, rock, or the tank glass — instead of burying them like a leopard gecko does.

Incubation Data

Leave the eggs where the female glued them, or remove them carefully with the surface still attached. Crocodile gecko eggs don't handle rotation well, so mark the top with a pencil before moving them.

Set your incubator to 82-86°F with moderate humidity around 70-80%. A basic reptile egg incubator holds these numbers steady far better than a DIY tub setup.

Eggs hatch in 55-70 days at these temperatures. Unlike leopard geckos, crocodile gecko sex isn't set by incubation temperature — it's genetic, so you can't skew the ratio by running the incubator warmer or cooler.

Hatchlings measure about 1.5 inches long. House them separately with the same dry-to-humid gradient as adults, just scaled down to a smaller enclosure.

Morphs and Color Variation

Crocodile geckos don't have an established morph market like leopard geckos or crested geckos do. What you'll see instead is natural locality variation.

Geckos from Spain tend to run gray-brown. Italian specimens often show more warm, reddish tones. North African populations can look darker overall, likely as camouflage against darker rock.

Breeders haven't selectively bred crocodile geckos for color the way they have with leopard geckos and their many morphs. If you want a specific look, buy from a breeder who can tell you the collection locality, not a "morph name."

That may change as more keepers breed this species. For now, treat any "morph" label with caution — it usually just means locality, not a fixed genetic trait.

Common Health Issues

Crocodile geckos are hardy, but a few problems come up more than others. Catching them early makes treatment much easier.

Weak bones (metabolic bone disease): This happens when a gecko doesn't get enough calcium or UVB light. Look for a soft jaw, bent limbs, or trouble climbing. Dust food with calcium and run a low-output UVB bulb to prevent it.

Breathing problems: Too much humidity for too long is the usual cause. Watch for open-mouth breathing, wheezing, or mucus around the nose. Dry the tank out and get a vet check if you see these signs.

Shedding stuck to toes: Low humidity spikes can leave old skin stuck on toes and tail tips. Retained shed can cut off blood flow if it's not removed. A humid hide with damp moss gives your gecko a spot to shed cleanly.

Egg binding: Females can struggle to pass eggs if they're too young, too thin, or short on calcium. A vet visit is the safest move if a gravid female goes more than a few days past her normal laying window.

Ready to build your crocodile gecko setup? Shop now for everything you need on Amazon and get your bioactive tank running this weekend.