Cuban Rock Iguana (Cyclura nubila) Care Sheet
The Cuban Rock Iguana is a large, powerful and highly intelligent iguana native to Cuba and surrounding islands. It is one of the better-known members of the genus Cyclura, commonly referred to collectively as rock iguanas.
Adults are impressive animals with heavily built bodies, strong limbs, prominent dorsal crests and substantial jowls, particularly in mature males. Colouration varies through shades of grey, olive, brown and darker tones.
Captive-bred Cuban Rock Iguanas can become remarkably confident around familiar keepers, but their intelligence should not be confused with domestication. Adults are extremely strong reptiles requiring purpose-built accommodation, intense lighting, high levels of UVB, substantial basking areas and a carefully formulated predominantly herbivorous diet.
Quick Facts
Scientific name: Cyclura nubila
Common name: Cuban Rock Iguana / Cuban Iguana
Family: Iguanidae
Origin: Cuba and associated islands
Adult size: Approximately 100–150 cm (3.3–5 ft) total length, with males generally larger
Lifespan: Approximately 30–40+ years with appropriate care
Activity: Diurnal
Lifestyle: Predominantly terrestrial
Diet: Primarily herbivorous
Temperament: Intelligent and often confident; adults are extremely powerful
Experience level: Experienced
Natural History
Cuban Rock Iguanas inhabit environments including:
- Dry forest
- Coastal scrub
- Rocky terrain
- Limestone areas
- Open woodland
They are strongly terrestrial but are capable climbers.
Much of their day is spent moving between basking locations, feeding areas and secure retreats.
Natural shelters can include:
- Rock crevices
- Caves
- Burrows
- Dense vegetation
As strongly diurnal reptiles, Cuban Rock Iguanas experience intense natural sunlight.
Captive husbandry must therefore place particular emphasis on heat, UVB and bright visible light.
Adult Size & Commitment
A juvenile Cuban Rock Iguana may initially be maintained in relatively modest accommodation, but this should never obscure its eventual adult requirements.
Large males can become extremely substantial animals.
An adult requires enough room to:
- Walk
- Turn freely
- Fully stretch
- Dig
- Climb
- Bask
- Exercise
- Retreat from view
A conventional small reptile vivarium is not appropriate permanent accommodation.
The eventual adult enclosure should be planned before acquiring the animal.
Enclosure
For a single adult, approximately:
300 × 150 × 180 cm (10 × 5 × 6 ft)
should be regarded as a practical minimum starting point for indoor accommodation, with larger accommodation strongly preferred.
Large adult males can particularly benefit from dedicated reptile rooms or substantial purpose-built enclosures.
The enclosure should provide:
- Large basking platforms
- Deep substrate
- Secure retreats
- Robust climbing structures
- Visual barriers
- Multiple temperature zones
- Fresh water
- Foraging opportunities
For a species of this size and intelligence, additional space provides considerable welfare benefits.
Outdoor Accommodation
Where climate permits, secure outdoor accommodation can provide exceptional opportunities for natural behaviour.
Benefits include:
- Natural sunlight
- Exercise
- Grazing
- Digging
- Environmental variation
Outdoor enclosures must provide:
- Escape-proof construction
- Protection from predators
- Secure foundations
- Shade
- Shelter
- Drinking water
- Protection from unsuitable weather
In climates such as Ireland and the UK, Cuban Rock Iguanas cannot normally be maintained outdoors year-round without appropriately heated accommodation.
Natural sunlight is beneficial when conditions are suitable, but shade must always remain available.
Ordinary window glass blocks most useful UVB.
Enclosure Security
Adult Cuban Rock Iguanas are exceptionally strong.
Enclosure construction must withstand:
- Digging
- Scratching
- Climbing
- Pushing
- Repeated contact with doors and furnishings
Provide:
- Strong doors
- Reliable locks
- Robust ventilation
- Protected electrical equipment
- Securely mounted lighting
- Heavy-duty furnishings
Any internally accessible heating equipment must be safely guarded.
An adult iguana can easily damage lightweight furnishings designed for smaller reptiles.
Housing
Cuban Rock Iguanas do not require companionship.
Individual housing is entirely appropriate.
Adult males can be extremely territorial and should not be casually housed together.
Male/female pairs or groups require very substantial accommodation and careful observation.
Potential problems include:
- Territorial aggression
- Bite injuries
- Tail injuries
- Food competition
- Basking competition
- Chronic stress
- Excessive reproductive pressure on females
Animals must be separated immediately when persistent aggression or intimidation occurs.
Temperature & Heating
Cuban Rock Iguanas require high basking temperatures.
Suitable conditions are approximately:
Basking surface: 40–45°C
Warm ambient area: approximately 28–32°C
Cooler area: approximately 24–27°C
Night: approximately 20–24°C
Large iguanas require a broad basking zone.
The objective is to warm a substantial portion of the animal’s body rather than create one small intensely heated spot.
Multiple basking lamps may therefore be necessary.
The iguana must always be able to move away from heat.
All heating equipment must be appropriately controlled and safely installed.
Use reliable digital thermometers and an infrared thermometer to verify temperatures.
UVB
Strong UVB provision is essential.
Cuban Rock Iguanas are heliothermic reptiles naturally exposed to intense sunlight.
A high-output linear UVB system should be used indoors.
A useful basking target is approximately:
UVI 3–6
with shaded areas where exposure falls substantially lower.
The iguana must be able to regulate its own exposure.
Actual UV intensity depends upon:
- Lamp type
- Reflector
- Distance
- Mesh
- Enclosure design
Follow manufacturer recommendations and ideally verify exposure using an appropriate UV meter.
UVB lamps should be replaced according to manufacturer guidance.
Visible Light
Bright visible lighting should accompany heat and UVB.
High-quality daylight-spectrum LED lighting can help create the bright daytime environment appropriate for a sun-loving iguana.
Provide approximately:
10–12 hours of light per day
with seasonal variation if desired.
A bright enclosure encourages natural daytime activity and establishes a strong day/night cycle.
The enclosure should become genuinely dark at night.
Avoid coloured nighttime bulbs.
Humidity
Cuban Rock Iguanas generally inhabit relatively dry environments.
A useful general humidity range is approximately:
40–60% relative humidity
with natural daily fluctuations.
More humid microclimates can be provided in selected retreats.
The entire enclosure should not remain constantly damp.
Good ventilation is essential.
Environmental management should consider:
- Humidity
- Hydration
- Substrate moisture
- Airflow
- Temperature
rather than attempting to maintain one exact humidity figure continuously.
Water
Fresh drinking water must be available at all times.
Provide a large, heavy water container that cannot easily be overturned.
Water should be:
- Changed regularly
- Replaced immediately when contaminated
- Provided in a thoroughly cleaned container
Some iguanas will enter or defecate in their water container.
Frequent cleaning may therefore be necessary.
Substrate
A naturalistic substrate can provide significant opportunities for digging and exploration.
Suitable options include:
- Reptile-safe soil
- Soil/sand mixtures
- Naturalistic semi-arid substrates
- Excavatable substrates
Large enclosures can contain different substrate zones.
Avoid:
- Cedar
- Pine
- Calcium sand
- Sharp gravel
- Artificially scented substrates
- Pesticide-treated soil
Substrate should be maintained hygienically and replaced when necessary.
Digging
Cuban Rock Iguanas are capable diggers.
Deep substrate allows:
- Digging
- Scratching
- Investigation
- Construction of shallow retreats
Digging opportunities are particularly important for mature females.
Females can develop eggs even when a male is absent.
A sexually mature female should therefore have access to an appropriate nesting area when reproductive behaviour indicates it may be required.
Furnishing & Enrichment
Cuban Rock Iguanas are intelligent animals and benefit greatly from environmental complexity.
Suitable furnishings include:
- Large rocks
- Strong logs
- Heavy-duty branches
- Elevated platforms
- Sheltered retreats
- Digging areas
- Visual barriers
- Multiple basking locations
Enrichment can include:
- Browse
- Safe edible plants
- Foraging opportunities
- Different food presentation
- Changes in substrate
- Controlled exploration of additional secure areas
All structures must be securely anchored and capable of supporting a large adult.
Diet
Cuban Rock Iguanas should receive a predominantly herbivorous diet.
The majority of food should consist of varied leafy greens and appropriate vegetation.
Useful foods can include:
- Dandelion greens
- Collard greens
- Mustard greens
- Turnip greens
- Endive
- Escarole
- Rocket
- Watercress
- Mulberry leaves
- Grape leaves
- Hibiscus leaves and flowers
- Other safe edible browse
Dietary variety is important.
No single green should dominate the diet indefinitely.
Vegetables
Additional vegetables can include:
- Squash
- Courgette
- Green beans
- Okra
- Bell pepper
- Parsnip
These should complement leafy vegetation rather than replacing it.
Food can be presented in different forms to encourage natural feeding behaviour.
Large leaves and browse provide useful opportunities for tearing and manipulation.
Fruit
Fruit should form only a small proportion of the diet.
Suitable occasional foods can include:
- Berries
- Papaya
- Mango
- Fig
- Melon
Fruit is relatively high in sugar and should not become a dietary staple.
A bowl dominated by sweet fruit may be readily accepted but does not represent an appropriately balanced long-term diet.
Animal Protein
Cuban Rock Iguanas are primarily herbivorous.
Wild animals may occasionally consume animal material opportunistically, but routine feeding of high-protein animal foods is unnecessary.
Do not base the captive diet around:
- Dog food
- Cat food
- Meat
- Eggs
- Large quantities of insects
A varied plant-based diet should form the foundation of nutrition.
Calcium & Supplementation
Healthy skeletal development depends upon:
- Dietary calcium
- Appropriate calcium-to-phosphorus balance
- Strong UVB exposure
- Vitamin D3 metabolism
- Correct basking temperatures
An appropriate calcium supplement can form part of the feeding programme.
A suitable reptile multivitamin can also be provided periodically.
Supplementation cannot compensate for inadequate UVB or a poor diet.
Growing juveniles and reproductive females have particularly important calcium requirements.
Foods to Avoid
Avoid inappropriate foods including:
- Avocado
- Rhubarb
- Onion
- Garlic
- Dairy products
- Processed human foods
- Dog food
- Cat food
- High-sugar foods
Wild plants must be positively identified before feeding.
Do not collect vegetation from areas potentially contaminated by:
- Pesticides
- Herbicides
- Road pollution
- Animal waste
Feeding Frequency
Juveniles should generally receive fresh food daily.
Adults should also be offered fresh vegetation regularly, with quantities adjusted according to:
- Body condition
- Activity
- Age
- Reproductive status
Remove spoiled food promptly.
Regular weighing and visual assessment are useful because captive iguanas can become overweight when offered excessive calorie-dense foods.
Handling & Interaction
Captive-bred Cuban Rock Iguanas can become extremely confident around familiar people.
Some individuals learn routines and may voluntarily approach their keepers.
However, adults remain powerful reptiles equipped with:
- Strong jaws
- Sharp claws
- Powerful limbs
- Heavy tails
Interaction should be built around familiarity and voluntary cooperation rather than physical force.
Avoid chasing or repeatedly grabbing the animal.
Body Language
Understanding iguana body language is essential.
An uncomfortable or territorial animal may display:
- Body inflation
- Lateral presentation
- Head movements
- Tail positioning
- Open-mouth displays
- Rapid movement towards or away from the keeper
Individual animals develop recognisable behavioural patterns.
Respecting these signals reduces stress and the likelihood of defensive injuries.
Tail Safety
The tail of a large Cuban Rock Iguana is powerful.
A frightened or defensive animal can use it as an effective whip.
Keepers should remain aware of the animal’s entire body rather than concentrating only on its head.
Never deliberately provoke defensive behaviour.
Children should not interact with a large adult without close supervision from an experienced adult.
Shedding
Cuban Rock Iguanas shed in sections rather than in one complete piece.
Pay particular attention to:
- Toes
- Tail
- Limbs
- Dorsal crest
Correct hydration and environmental conditions usually allow normal shedding.
Textured rocks and branches can assist naturally.
Do not forcibly peel skin that is not ready to detach.
Persistent retained shed around toes or the tail can restrict circulation and should be addressed appropriately.
Health
Potential health concerns include:
- Metabolic bone disease
- Calcium deficiency
- Obesity
- Burns
- Retained shed
- Respiratory disease
- Parasites
- Mouth infections
- Trauma
- Reproductive complications
- Nutritional disease associated with inappropriate diets
Warning signs include:
- Weakness
- Tremors
- Swollen limbs
- Abnormal jaw shape
- Difficulty walking
- Significant weight loss
- Persistent refusal to feed
- Mouth swelling
- Nasal discharge
- Laboured breathing
- Significant behavioural change
Persistent or serious symptoms require assessment by a suitably experienced reptile/exotic veterinarian.
Reproductive Health
Sexually mature females can develop eggs even without mating.
Possible signs include:
- Increased digging
- Restlessness
- Reduced appetite
- Abdominal enlargement
- Increased investigation of potential nesting sites
Suitable nesting substrate should be available when required.
Egg retention or dystocia can become life-threatening.
A female repeatedly attempting to lay without success, becoming weak or displaying significant abdominal swelling requires urgent veterinary assessment.
Quarantine
New Cuban Rock Iguanas should undergo quarantine away from established reptiles.
During quarantine:
- Record body weight
- Monitor feeding
- Examine faeces
- Check skin
- Monitor breathing
- Observe behaviour
- Check for external parasites
- Maintain separate equipment where practical
Veterinary faecal testing may be appropriate, particularly where an animal’s history is uncertain.
Captive-bred animals should be strongly preferred.
Breeding
Cuban Rock Iguanas are egg-laying reptiles.
Breeding should only be attempted with healthy mature animals and sufficient facilities to safely manage adults and offspring.
Breeding requires knowledge of:
- Sexing
- Sexual maturity
- Territorial behaviour
- Courtship
- Pair compatibility
- Female body condition
- Nesting
- Egg incubation
- Hatchling husbandry
Females require substantial calcium reserves and suitable nesting areas.
Males can become particularly territorial during reproductive periods.
Animals must be separated if aggression becomes dangerous.
Conservation
Cuban Rock Iguanas are conservation-sensitive Caribbean reptiles.
Wild populations face pressures including:
- Habitat destruction
- Human development
- Introduced predators
- Competition from introduced animals
- Illegal collection in some areas
Responsible captive keeping should prioritise legally established captive-bred animals.
Accurate lineage records are particularly valuable within captive breeding programmes.
CITES & Legal Considerations
Cuban Rock Iguanas are internationally regulated wildlife.
C. nubila is included within international wildlife trade controls under CITES.
Documentation and permit requirements can vary depending upon:
- Country
- Origin of the animal
- Type of transaction
- Commercial or non-commercial use
- International movement
Keep all documentation associated with an animal throughout its life.
Always confirm current legal and CITES requirements before buying, selling, importing or exporting an animal.
Responsible Ownership
Cuban Rock Iguanas represent a commitment potentially lasting 30–40 years or longer.
Before acquiring one, consider:
- Very large adult enclosure requirements
- Strong UVB requirements
- Heating and electricity costs
- Fresh food requirements
- Veterinary care
- Physical strength
- Holiday care
- Long lifespan
These are impressive animals but require considerably more space and resources than most commonly maintained lizards.
Captive-bred animals from reliable sources should be strongly preferred.
Never release a captive iguana into the wild.
Summary
The Cuban Rock Iguana is an impressive and intelligent Caribbean reptile requiring substantial long-term commitment.
Successful husbandry depends upon providing a very large and robust enclosure, intense full-spectrum lighting, strong UVB, a broad high-temperature basking zone, extensive environmental enrichment and a varied predominantly herbivorous diet with appropriate calcium provision.
Their intelligence and potential to become confident around familiar keepers make them exceptionally rewarding animals, but their considerable adult size and strength demand experienced and responsible management.
With appropriate space and husbandry, Cyclura nubila can remain an extraordinary captive reptile for several decades.
IMPORTANT INFORMATION
This care sheet provides general husbandry guidance and does not replace species-specific research or veterinary advice. Individual requirements may vary.
If you have concerns about an animal’s health or care, consult a suitably experienced exotic or reptile veterinarian.
Information correct at the date of publication.
reptilecommunity.com | Revised: August 2026