Use this guide as a starting point alongside the detailed sources below. Health concerns, unexplained changes in behavior, or feeding problems belong with a reptile veterinarian.
Adult enclosure recommendation
Our recommended minimum: 70.9″ × 35.5″ × 59.1″ (180 × 90 × 150 cm), length × depth × height.
Usable internal space for 1 adult animal. One identified adult Crocodilurus amazonicus up to ≈ 11.811″ (30 cm) snout-to-vent length; a provisional spatial recommendation, not a complete commissioned care protocol.
Height is the usable internal envelope, including the space reserved for substrate and water. Check the remaining movement space and lamp clearance after installation.
The provisional layout still needs a defensible pool depth and environmental assessment. Extra swimming area and accessible dry branches may be useful, but a larger numerical box would not resolve those evidence gaps.
Our provisional minimum applies the FBH (Federation of British Herpetologists) teiid 6 × 3 × 3 snout-to-vent-length rule to a ≈ 11.811″ (30 cm) adult example, then increases height from ≈ 35.433″ to 59.055″ (90 to 150 cm) to preserve climbing above water and substrate. The additional height is editorial design judgment informed by field climbing observations, not a validated optimum. Water depth and environmental commissioning remain unresolved.
Use snout-to-vent length, not total tail-inclusive length. At ≈ 11.811″ (30 cm) body length FBH gives ≈ 70.9″ × 35.5″ × 35.5″ (180 × 90 × 90 cm); our internal-height adaptation is ≈ 59.055″ (150 cm). For ≈ 13.78″ (35 cm) body length use at least ≈ 82.7″ × 41.4″ × 59.1″ (210 × 105 × 150 cm) and reassess pool and clear climbing space.
Adult ≈ 13.78″ (35 cm) snout-to-vent length
Our recommended minimum: 82.7″ × 41.4″ × 59.1″ (210 × 105 × 150 cm), length × depth × height. FBH floor scaling with our provisional climbing-height allowance.
- Floor space
- Reserve roughly half the ≈ 17.438 ft² (1.62 m²) footprint for water, about ≈ 8.719 ft² (0.81 m²), and retain dry basking and sheltered land.
- Climbing space
- Provide stable branches and dry elevated retreats. Our ≈ 59.055″ (150 cm) height includes water/substrate; the final clear movement height depends on a reviewed pool depth.
- Substrate
- Provide a maintainable terrestrial margin with stable furnishings; a defensible species-specific digging depth was not established.
- Water
- A swimming pool, gentle exits, filtration and service access are essential to the proposed design. The sources do not establish a defensible numerical water depth; obtain a documented adult pool assessment before occupancy.
- Security and ventilation
- Guard filters and heaters, lock access and rehearse water changes without escape routes. The provisional dimensions alone do not establish suitability.
Evidence gaps requiring review:
- Published field ecology, the FBH framework and the zoo hatching report do not establish adult pool depth, full water/air/surface/night targets, a measured UVB (ultraviolet B) protocol or a nutritionally complete captive feeding schedule. These specific commissioning details require documented species-experienced review before acquisition.
Meeting these dimensions alone does not establish suitability. Check the usable layout, environmental conditions, equipment clearance and the individual animal’s requirements before occupation.
Plan for a swimming lizard
Confirm Crocodilurus amazonicus identity before planning care. It uses water margins and swimming routes and can climb; it is not a small terrestrial tegu or a caiman-lizard substitute. House one animal as our precautionary recommendation and prepare secure access for pool maintenance.
Our recommended adult enclosure
For one adult up to ≈ 11.811″ (30 cm) snout-to-vent length, our provisional recommended minimum is ≈ 70.9″ × 35.5″ × 59.1″ (180 × 90 × 150 cm), measured as usable internal length × depth × height. The FBH body-length framework supplies the floor rule; we increase height to leave room for climbing above the water system. For a ≈ 13.78″ (35 cm) body, use at least ≈ 82.7″ × 41.4″ × 59.1″ (210 × 105 × 150 cm). These are editorial recommendations, not a scientifically validated species minimum or permission to house an animal before the remaining conditions are resolved. No separate preferred numerical target is established. Juveniles need easier exits and close feeding observation, with permanent adult housing planned in advance.
Separate the water system from dry refuges
Allocate about half the minimum footprint, 8.7 sq ft (0.81 m²), to a pool, preserving accessible dry land and elevated cover. Field observations support shallow foraging margins and swimming, but do not establish a safe adult pool depth. That number remains a specific review blocker. Show the actual water depth, submerged turning route, exit slope and remaining climbing clearance in the commissioning plan; ≈ 59.055″ (150 cm) is total internal height, including water and substrate. Anchor branches independently and make filter servicing possible without opening the entire enclosure. A running pump is not evidence that water quality is adequate.
Resolve the environmental protocol before occupancy
Record separate basking-surface, daytime air, night air and water temperatures, plus humidity and measured UVB at accessible perches. The reviewed primary ecology and zoo announcement do not supply a complete captive protocol. Wild water temperatures, body temperatures and basking observations cannot safely be relabeled as thermostat settings. We therefore do not invent numerical targets or transfer the caiman-lizard protocol. A documented species-specific keeper protocol with outcomes and measurement locations is needed before acquisition. Provide shade, dry retreats and protected equipment as design requirements while that work is completed.
Establish diet continuity
Plan a varied supply of appropriate invertebrates and aquatic prey with a species-experienced keeper and reptile veterinarian. The field stomach study supports aquatic prey use but cannot determine captive portions, meal frequency, fish selection or supplementation. Obtain the individual's accepted-food and growth records before transfer. Do not feed wild prey merely because it appears in a stomach study, or treat meat alone as a complete diet. Keep food offered, food accepted and waste-removal records together.
References: [2]
Review readiness and daily care
Postpone acquisition until the identified environmental and nutritional gaps are closed for the animal. Once a qualified plan exists, log water changes, temperatures, feeding, body condition and use of land and branches. Provide a secure transfer method rather than relying on hand capture. Wounds, abnormal breathing, impaired swimming or loss of condition need prompt reptile-veterinary assessment. Nashville Zoo's successful hatching demonstrates that captive reproduction is possible; its announcement does not publish the protocol needed to reproduce that result at home.
References: [3]
Sources & further reading
Read the full recommendations and check details for your animal, equipment, and local conditions.
- Federation of British Herpetologists: Recommended Minimum Enclosure Size
- Martins 2006: Life in the water
- Nashville Zoo: Crocodile tegu hatching announcement
- CITES Animals Committee AC 25 Doc 15.5 (CITES: Convention on International Trade in Endangered Species of Wild Fauna and Flora)
- Reptile Database: Crocodilurus amazonicus
Original Creature Corner guide. Editorial fact and citation checks are recorded; independent veterinary review has not been performed.
