🐾 Land🐟 AquaticCare difficulty: IntermediateLegal complexity: Low
African Sideneck Turtle
Pelusios castaneus · also called West African Mud Turtle, West African Sideneck Turtle, Chestnut-bellied Sideneck Turtle, Smiling Turtle
A hardy, personable semi-aquatic side-necked turtle from western and central Africa, named for the way it folds its head sideways under the shell rim rather than retracting it straight back. Its perpetual 'smile' and forgiving temperament make it a popular intermediate aquatic-turtle choice.
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Quick facts
| Size | Carapace 9-11 in (23-28 cm); females typically larger than males. |
| Lifespan | 25–50 years |
| Social needs | solo |
| Native region | Western and central Africa (Senegal and coastal West Africa east through the Congo Basin), with introduced populations e |
| Origin | Old World |
| Climate | 🌴 Tropical |
| Water type | 💧 Freshwater |
| Family | Pelomedusidae |
| Genus | Pelusios |
Part of the Turtles
Turtles are aquatic and semi-aquatic chelonians that need large, well-filtered water, basking areas with UVB and heat, and varied omnivorous diets. Many grow far larger and live far longer than buyers expect, so housing and lifespan planning are essential.
Habitat & space requirements
From the minimum an animal needs to be kept humanely, up to the ideal setup. Bigger is almost always better — minimums are floors, not targets.
Life & growth stages
How this animal changes through its life — each stage often has its own care, diet and space needs.
Habitat & enclosure
Provide a large aquatic setup: at least 75-110 gallons of water for a single adult, with floor space prioritized over depth. Water can be moderately deep since these are competent swimmers, but always include an easy haul-out or basking platform reachable from the bottom. Maintain water at 72-82°F (22-28°C) and a basking surface of 90-95°F (32-35°C). They tolerate a range of water hardness; aim for clean, well-filtered, slightly soft-to-neutral water (pH ~6.5-7.5). Juveniles can be kept in shallower water with abundant resting spots until strong swimmers.
Substrate
A bare-bottom tank is easiest to keep clean, or use large smooth river stones too big to swallow. Avoid fine gravel that can be ingested and cause impaction. Some keepers add a thin layer of sand in a planted section. Live or sturdy artificial plants, driftwood, and cork provide cover and reduce stress; ensure all hardscape is stable and cannot trap the turtle underwater.
Equipment & setup
Use an oversized canister or large hang-on-back filter rated well above the tank volume — these turtles are messy. Provide a submersible or external heater (guarded) for water, a basking lamp for the 90-95°F hotspot, and a UVB source (5.0-10.0 linear bulb or appropriate UVB flood) replaced every 6-12 months. A secure, ventilated lid is essential. A turtle dock or ramp gives a dry basking site; a separate digital thermometer for water and basking zones helps maintain the gradient.
Diet
Opportunistic omnivore leaning carnivorous. Stake the diet on a quality aquatic-turtle pellet plus a rotation of protein: earthworms, snails, crickets, blackworms, shrimp, and occasional thawed fish or lean meat. Offer leafy greens and aquatic plants (duckweed, anacharis, water lettuce) as turtles mature; adults take more plant matter than juveniles. Feed juveniles daily, adults every 2-3 days, and avoid overfeeding to prevent obesity and shell pyramiding. Provide a calcium source (cuttlebone) and dust prey periodically.
Behavior & temperament
Diurnal, active, and notably bold once settled — many learn to beg at feeding time. Generally calm and among the more handleable aquatic turtles, though all turtles tolerate rather than enjoy handling and may bite or release a musky odor if startled. Keep one per tank as a rule; males can be aggressive toward each other and toward females, and mixed groups need ample space and visual breaks. Strong, persistent escape artists that will climb and push against lids and gaps.
Health
Common issues are shell rot and skin infections from poor water quality, respiratory infections from cold or fluctuating temperatures, and metabolic bone disease without adequate UVB and calcium. Unlike many hard-shelled turtles, this species sheds skin in large flakes rather than shedding individual scutes — flaking skin is normal, but watch for soft shell, swollen eyes, lethargy, or buoyancy/listing problems. Robust feeders that hide illness well, so monitor appetite and basking behavior closely. Quarantine new animals; many imports carry parasites, so a fecal check with an exotics vet is wise.
Tips, DIY & hacks
Filtration is everything: choose a filter rated for 2-3x the water volume and do regular partial water changes to prevent shell and skin disease. Keep singly to avoid bite injuries. Because they are accomplished climbers and pushers, weight or clamp the lid. A 'feeding tub' (moving the turtle to a separate container for messy protein feedings) keeps the display tank cleaner. Provide both UVB and a true basking heat lamp — one does not replace the other.
Sources
- West African Mud Turtle Care Sheet (care sheet)
- Pelusios castaneus - Natural History, Care, and Photo Gallery (The Turtle Room) (species profile)
- African Sideneck Turtle - Pelusios castaneus (PetMD) (veterinary)
- Wikipedia: African Sideneck Turtle (wiki)