reptile

Yellow-Bellied Slider

Trachemys scripta scripta

The yellow-bellied slider is the red-eared slider's closest widely-kept relative — both belong to the species Trachemys scripta, and the two subspecies overlap enough in aquarium care that a keeper of one can follow nearly all the same aquatic-turtle fundamentals for the other (this profile covers the specific differences; see the red-eared slider profile for the full baseline on tank size, filtration, and UVB). Where the red-eared slider gets its name from the distinctive red stripe behind each eye, the yellow-bellied slider lacks that red marking and instead carries broad yellow blotches on the sides of the head and a mostly unmarked, uniformly yellow plastron — the field mark most keepers actually use to tell the two apart at a glance, since juveniles of both subspecies otherwise look fairly similar. Its native range is also more geographically confined to the southeastern U.S., where the red-eared slider's native range centers on the Mississippi River basin further west; the two ranges do overlap and naturally-occurring hybrids exist, which is part of why the two subspecies are classified under the same species rather than as fully separate species. Adult yellow-bellied sliders also run somewhat smaller on average than red-eared sliders of the same sex, a modest but real difference that shows up most clearly in mature females, though individual variation and diet mean the size ranges overlap considerably rather than being cleanly separated.

Husbandry

Enclosure size

Minimum 10 gallons of water per inch of shell length; a single adult female typically needs 70-100+ gallons, a modestly smaller tank footprint than a red-eared slider of equivalent age given this subspecies' generally smaller mature size

Source: Merck Veterinary Manual — Chelonian Husbandry (checked 2026-04-02)

Temperature gradient

Basking platform 90-95°F (32-35°C); water temperature 75-80°F (24-27°C)

Source: Association of Reptilian and Amphibian Veterinarians (ARAV) husbandry guidance (checked 2026-04-02)

UVB lighting

10-12% UVB tube positioned over the basking platform (never through glass or plastic, which filters UVB out), replaced every 6-12 months; identical UVB output and mounting to the red-eared slider, since both subspecies bask under the same intensity of natural sun across overlapping latitudes

Source: UVGuide UK / ARAV lighting guidance (checked 2026-04-02)

Diet

Juveniles: mostly protein (commercial turtle pellets, feeder fish, occasional insects). Adults: shift toward roughly 50% aquatic plants and vegetables such as duckweed, water lettuce, and dark leafy greens offered floating in the water

Source: Merck Veterinary Manual — Chelonian Nutrition (checked 2026-04-02)

Supplementation

Cuttlebone or calcium block available at all times to support shell and bone density

Source: ARAV husbandry guidance (checked 2026-04-02)

Cohabitation

Can be kept in groups with adequate space and multiple basking spots, but overcrowding drives stress, aggression, and disease spread the same way it does in the red-eared slider

Source: Merck Veterinary Manual — Chelonian Husbandry (checked 2026-04-02)

Handling

Handling expectations mirror the red-eared slider closely: this is not a species that seeks out or enjoys being held, and a yellow-bellied slider will scratch, kick, and occasionally bite defensively if picked up. Support the shell fully with both hands when handling is genuinely necessary (health checks, tank moves) and keep the session brief. The same well-documented Salmonella risk associated with aquatic turtles applies here, making thorough hand-washing after any handling or tank maintenance a real hygiene requirement rather than an optional precaution. Like the red-eared slider, most individuals do settle into a predictable daily rhythm around feeding and basking and will recognize a familiar keeper's approach to the tank with anticipatory swimming, even though that recognition never translates into a tolerance for prolonged handling the way it might in a more handling-tolerant species like a bearded dragon.

Signs of good health

• A hard, evenly-colored shell with no soft spots or flaking beyond normal scute shedding
• Clear, unswollen eyes (swelling is a classic vitamin A deficiency sign in Trachemys turtles)
• Active swimming and a consistent daily basking pattern, spending real time fully out of the water drying off on the basking platform each day
• Steady appetite and normal buoyancy, with no listing to one side that could indicate a respiratory issue
• Clean nares with no bubbling or discharge while breathing
• Vivid, well-defined yellow head blotches and plastron coloration, without unusual dulling or discoloration that could signal a shell or skin infection

Common problems

14 common reptile problems are tracked for this species; 0 have full guides published so far.

Recommended gear for this taxon

Equipment categories that are genuinely correct for this species' welfare needs — see the full Gear Guide for the complete list.

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