Reptile · Semi-aquatic turtle
Diamondback terrapin care guide
Malaclemys terrapin
The diamondback terrapin is a advanced-level semi-aquatic turtle from US Atlantic and Gulf coasts. Adults reach Females 15–23 cm, males 10–14 cm and live 25–40 years in captivity. A brackish-water turtle: keep a large water section with marine salt at low specific gravity.
- Enclosure 240 × 60 × 60 cm
- Temp Water 24–27°C, basking 32°C
- Humidity Not critical (aquatic)
How much does a diamondback terrapin cost in Canada?
Diamondback terrapin quick facts
- Skill level
- Advanced
- Adult size
- Females 15–23 cm, males 10–14 cm
- Lifespan
- 25–40 years
- Activity
- Diurnal
- Native range
- US Atlantic and Gulf coasts
- Minimum enclosure
- 240 × 60 × 60 cm (94 × 24 × 24 in, ≈ 228 US gal)
- Housing
- Best kept alone.
- Temperature
- Water 24–27°C, basking 32°C
- Humidity
- Not critical (aquatic)
- UVB
- Required
- Diet
- Carnivore – snails, shrimp, fish, insects, pellets
- Bioactive style
- Semi-aquatic (paludarium)
Diamondback terrapin enclosure & bioactive setup
Give one adult at least 240 × 60 × 60 cm (94 × 24 × 24 inches). Best kept alone. This species suits a semi-aquatic (paludarium) bioactive build.
- Leaf litter2 cm
- Jurassic ABG Terrarium Mix8 cm
- Drainage – clay bio balls4 cm
Quantities assume about half the floor is land. The water half needs a filter and regular partial water changes.
Temperature: Water 24–27°C, basking 32°C. Humidity: Not critical (aquatic). UVB: Required.
What does a diamondback terrapin eat?
Carnivore – snails, shrimp, fish, insects, pellets. Feed adults every 1–2 days.
Handling, temperament & health
Alert and active; avoid frequent handling.
Health watch: Shell and skin infections in fresh water; needs a brackish setup.
Cleaning & maintenance schedule
Daily
- Check water and air temperature; feed according to species.
Weekly
- Change 20–30% of the water with dechlorinated water.
- Rinse filter sponge in old tank water (never tap water) as needed.
Monthly
- Top up leaf litter on land; prune plants at the waterline.
Yearly
- Service the pump/filter fully.
Recommended for a diamondback terrapin bioactive
Quantities are for one minimum-size enclosure (240 × 60 × 60 cm).
Clay Bio Balls
Drainage layer, 4 cm
Jurassic ABG Terrarium Mix
Bioactive soil layer, 8 cm
Almond Leaves Dried 15/Pack
Leaf litter – food and cover for the clean-up crew
Fresh Sphagnum Moss Container
Moss for humidity pockets and planting
Malaysian Drift Wood
Bridges water and land; easy exit from the water
Cork Bark Flats
Shelter on the land section
Diamondback terrapin FAQ
Is the diamondback terrapin good for beginners?
The diamondback terrapin is an advanced species – best for experienced keepers. Alert and active; avoid frequent handling.
What size enclosure does a diamondback terrapin need?
At least 240 × 60 × 60 cm (about 94 × 24 × 24 inches, roughly 228 US gallons) for one adult. Best kept alone.
How much does a diamondback terrapin cost in Canada?
Typically $200–500 CAD to buy, about $1360–2450 CAD for a complete bioactive enclosure, and $350–650 CAD a year to keep.
What temperature and humidity does a diamondback terrapin need?
Temperature: Water 24–27°C, basking 32°C. Humidity: Not critical (aquatic).
What does a diamondback terrapin eat?
Carnivore – snails, shrimp, fish, insects, pellets. Feed adults every 1–2 days.
Similar species
This care sheet is general guidance from One Bioactive, not veterinary advice. Needs vary with age, locality and individual animals – confirm with your breeder and an exotics vet. Prices are typical Canadian ranges in CAD and change over time.