Marbled water monitor (Varanus marmoratus)
Monitors & tegus · Difficulty: Intermediate
Key facts and care guidance for Marbled water monitor (Varanus marmoratus) (origin: The northern Philippines (Luzon)). Adult size around 120–150 cm total length. Life expectancy 15–20 years. The values below are carefully researched guidance.
Short answers
Marbled water monitor: How big does the enclosure need to be?
250×120×150 cm.
Marbled water monitor: What temperature does it need?
Daytime 28–34 °C, basking spot 45 °C, at night 22–25 °C.
Marbled water monitor: Does it need UVB lighting?
UVB: Essential (UVB 10.0–12 %).
Marbled water monitor: How long do they live?
Life expectancy: 15–20 years.
Marbled water monitor: Is it suitable for beginners?
Rather not – it is considered an intermediate species (difficulty: Intermediate).
Climate
- Daytime temperature
- 28–34 °C
- Night temperature
- 22–25 °C
- Basking spot
- 45 °C
- Humidity
- 65–80 %
- UVB
- Essential (UVB 10.0–12 %)
Enclosure
- Minimum size
- 250×120×150 cm
- Substrate
- Soil and bark mulch, sturdy climbing branches, a large water section
Feeding
- Food
- Insects, roaches, fish, rodents, eggs
- Feeding interval
- 2×/week
Key facts
- Adult size
- 120–150 cm total length
- Life expectancy
- 15–20 years
- Origin
- The northern Philippines (Luzon)
- Protection status
- CITES II; export from the Philippines is prohibited
- Brumation
- None
- Cohabitation
- Keep them singly. Monitors and tegus are territorial; grown animals defend their territory and injure each other with serious bites in the process. Even small size differences mean one animal claims the warm spot and the food for itself while the other falls behind — which is often only noticed once the weaker animal has already lost weight. For breeding, put them together only under supervision.
Notes
Split from the salvator complex, with marbled markings. Very alert and fast – a quiet spot and plenty of visual screening reduce stress considerably.
Do you keep this species?
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Related species
- Argus monitor (Varanus panoptes) – Expert
- Bengal monitor (Varanus bengalensis) – Expert
- Blue tree monitor (Varanus macraei) – Expert
- Blue-tailed monitor (Varanus doreanus) – Intermediate to expert
- Finsch's monitor (Varanus doreanus finschi) – Expert
- Boatsi tree monitor (Varanus boatsi) – Expert
- Bogert's tree monitor (Varanus bogerti) – Expert
- Lace monitor (Varanus varius) – Expert
What you need to start
To keep Marbled water monitor (Varanus marmoratus) you typically need: a suitable enclosure (250×120×150 cm), substrate (Soil and bark mulch, sturdy climbing branches, a large water section), a heat source with a thermostat, UVB lighting, thermometer and hygrometer, a water dish and hides. You will find equipment in the Reptoria marketplace.
The complete, interactive care database is in the Reptoria app.
Last updated: 9 October 2026 · Editor: Reptoria editorial team · Sources include: https://en.wikipedia.org/wiki/Marbled_water_monitor, https://reptile-database.reptarium.cz/species?genus=Varanus&species=marmoratus
All values are non-binding guidance and do not replace expert advice. Research thoroughly from several sources before acquiring and keeping an animal, and observe the applicable law (species and animal protection in particular).