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Common Musk Turtle
Reptiles · Turtles

Common Musk Turtle

Sternotherus odoratus

Tiny bottom-walking stinkpot with a big attitudeIntermediate

Lifespan
30-50 years
Size
3-5 in shell
Social needs
Solitary; males fight and harass tank-mates
Time
Medium; regular feeds, weekly water changes
Cost
Medium
Diet
Carnivore (pellets, snails, worms, shrimp)

Overview

What is this animal?

  • The common musk turtle, affectionately called the stinkpot, is one of the smallest turtles in North America at just 3-5 inches of shell.
  • It earns the nickname from musk glands at the seams of the shell that can release a pungent odour when the turtle feels threatened, though captive-bred animals used to their keeper musk far less over time.
  • Two pale stripes run along each side of the face, and fleshy barbels under the chin and throat set it apart from the red-eared slider, the other fully aquatic turtle on this site.
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  • Its small adult size makes it the rare aquatic turtle that genuinely fits in an apartment-scale tank, needing a fraction of the space a slider does.
  • It is still a 30-to-50-year commitment with real filtration, heating, lighting and UVB costs, so treat it as a manageable turtle rather than an easy one.
  • Buy captive-bred only; wild-caught adults are still commonly sold and often adapt poorly, arriving stressed and parasite-laden.

Temperament

  • Musk turtles are bold, curious little animals, most active at dawn, dusk and after dark, methodically working the tank floor and investigating anything new.
  • They quickly learn to associate their keeper with food and will march to the glass at feeding time.
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  • They are watch-not-handle pets: the long, flexible neck can reach back almost to the hind legs, and a startled stinkpot bites hard for its size and may add the trademark musk.
  • Keep one turtle per tank.
  • Males fight each other, and in typical home aquaria a male will harass a female relentlessly with nowhere for her to escape.
  • Fast mid-water fish sometimes coexist, but shrimp, snails and small slow fish are simply food, so a single well-housed turtle is the kind default.

A good fit for

  • Keepers wanting an aquatic turtle that needs far less water than a slider
  • People who enjoy watching rather than handling
  • Evening observers; they are most active at dusk and after dark
  • Owners ready for a 30-50 year commitment
  • Those willing to over-filter and change the water weekly

Common mistakes to avoid

  • Deep bare tanks with no climb routes (drowning risk)
  • Skipping the dock and a proper UVB lamp because they rarely bask
  • A long-necked bite that reaches surprisingly far back
  • Daily feeding of adults; obesity is common
  • Wild-caught imports; insist on captive-bred

Enclosure

Minimum 79 gallons

Must be housed alone. Solitary; males fight and harass tank-mates

  • One adult needs an aquarium or turtle tub of at least 80 US gallons in total capacity, with a long, wide footprint; a 90-gallon tank or a 100-gallon stock tank is the practical way to get there.
  • Many care sheets give 20 to 55 gallons, but those are floors: the rule of 20 US gallons of tank per inch of shell asks 80 gallons for a 4-inch adult and 100 gallons for a large 5-inch one, and the water in it is kept wide and shallow rather than deep.
  • Floor area matters more than depth, because musk turtles are weak swimmers that walk along the bottom rather than cruising open water.
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  • Set the water at least 1.5 times the shell length deep so the turtle can right itself if flipped, which works out to roughly 5-8 inches for an adult and about 1.5-2 inches for a hatchling.
  • Adults can use 8-12 inches or more if the tank is densely furnished, so always provide driftwood, rock stacks or thick plants as ladders to the surface; a deep, bare tank is a genuine drowning risk for this species.
  • Hold the water at 72-78°F with a guarded submersible heater, keep juveniles a touch warmer near 80°F, and provide a dry dock or emergent branch under a basking lamp reaching 85-90°F.
  • Musk turtles bask far less than sliders and often just rest near the surface, but the dry option must always exist, and a proper UVB lamp over the dock (a 5% / T5 tube or equivalent, replaced yearly) supports shell and bone health.
  • Run a canister filter rated for at least double the tank volume and do a partial water change weekly, because a small volume of turtle water fouls much faster than a big one.

Check your enclosure

Supplies

Setup

  • Aquarium or tank, and a stand
  • Canister filter rated at two to three times the tank volume
  • Submersible heater with a guard
  • Basking dock
  • Basking lamp, UVB fixture and tube
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  • Water conditioner and liquid test kit
  • Water thermometer, and a temperature gun for the dock

Ongoing

  • Quality aquatic turtle pellets (carnivorous formula for musk turtles)
  • Frozen or live earthworms, shrimp and snails
  • Leafy aquatic greens or romaine for the omnivores
  • Floating cuttlebone
  • Separate feeding tub
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  • Fine net for removing uneaten food
  • Feeding tongs
  • Kitchen scale for tracking growth

Safe substrate: Bare bottom · Smooth river stones or slate larger than the turtle's head

Work out the cost

Care routine

Daily

  • Check water and basking-dock temperatures
  • Look the animal over
  • Spot-clean waste and uneaten food
  • Top up evaporated water with dechlorinated water

Every few days

  • Feed to the species' scheduleevery 2 days
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Weekly

  • Check the basking dock
  • Check the tank and its kit are kept away from food areas
  • Test the water
  • Water change and debris vacuum

Every few weeks

  • Weigh-inevery 2 weeks

Monthly

  • Deep-clean decor, glass and bowls
  • Rinse the filter media
  • Siphon under rocks and decor
  • Test thermostats, lamps and guards

Less often

  • Check the UVB lamp's age and replace it if due (if one is fitted)every 6 months

Vet: Annual exam and faecal check, every 12 months

Tools

Is your enclosure big enough?Check your measurements against the recommended sizeWhat will it cost?Setup, monthly and over its whole life, itemisedCan it eat that?Search 27 foods, from everyday to never

Care in depth

Diet

Carnivore (pellets, snails, worms, shrimp)
  • Musk turtles are strongly carnivorous bottom foragers that hunt snails, insects, worms and small crustaceans in the wild.
  • Base the captive diet on a quality carnivorous aquatic-turtle pellet, rotated with earthworms, snails, shrimp, crickets and the occasional piece of white fish.
  • Most individuals ignore greens, unlike the omnivorous red-eared slider, though offering some aquatic plants does no harm.
  • Feed hatchlings daily and adults every other day, with a portion roughly the size of the turtle's head.
  • Remove uneaten food promptly, or feed in a separate tub to spare water quality.
  • Whole shelled prey such as snails plus a floating cuttlebone cover calcium needs.
  • Feeding adults daily is one of the commonest keeper mistakes and quickly produces an obese turtle whose legs bulge from the shell openings.

Health

Signs of good health, and the common problems
  • A healthy musk turtle has a firm shell, clear eyes, a strong feeding response and busy bottom-patrolling behaviour.
  • The common problems are shell rot and fungal skin infections from dirty water, respiratory infection from chilling or unheated water, swollen eyes linked to vitamin A deficiency, and soft shell in juveniles kept without calcium and UVB.
  • Water quality sits behind most illness in this species, so test regularly and treat the filter and water-change schedule as preventive medicine.
  • Like all turtles they can carry Salmonella, so wash your hands every time after touching the turtle, its water, food or equipment, and supervise children.
  • A musk turtle floating lopsided, bubbling from the nose or refusing food for more than a few days needs a reptile-capable exotics vet, and it is worth confirming access to one before buying an animal that may outlive its keeper's mortgage.

Is this urgent?

3 warning signs and how fast to act, 1 of them right away

For aquatic turtles the water quality is half the medical history.

Go now

Swimming lopsided, or unable to submergeGo now. Usually respiratory, and a turtle that cannot dive cannot feed.
Now

Today

Puffy or closed eyesBook today and check the water. Often vitamin A deficiency plus dirty water.
Today

Soon

Soft or pitted shell, a bad smell, or patches where a scute lifts to show wet or reddened tissue underneath (thin, clear scute flakes peeling off a hard shell are normal shedding)Book, and test the water. Shell rot follows poor water quality or a basking site that never fully dries the animal. A shell that is soft rather than rotten points to calcium and UVB instead.
This week

A turtle needs a basking site that gets it fully dry and properly warm. Half the common problems trace back to a dock that does neither.

This is general guidance for a healthy adult, not a diagnosis. An exotics vet who knows your animal always overrides it, and the time to find one is before you need one.

Bedding and substrate

2 safe, 1 with a caveat, 3 to avoid

For an aquatic turtle the substrate is the tank floor, and the rule is that nothing on it fits in the turtle's mouth.

Safe

Bare bottomEasiest to keep clean, and it hides no waste.
safe
Smooth river stones or slate larger than the turtle's headRinse them, and stand stacked rock on the glass, not on top of sand, so it cannot shift.
safe

With a caveat

Fine aquarium sand, in a thin rinsed layer siphoned regularlySome keepers like it for bottom-walking musk turtles, but turtles swallow it, vets advise against it, and it can be kicked into the filter.
with a caveat

Never

Gravel or pebbles small enough to swallowTurtles swallow them, and swallowed stones can need surgery to remove.
never
Soil, coco fibre, bark, mulch or leaf litter in the waterThey foul the water and clog the filter.
never
Unguarded glass heatersTurtles crack them. Use a heater guard or an in-line heater.
never

Keep the basking dock fully dry. A gravid female needs a separate soil-and-sand nesting box, or she may retain her eggs.

Top resources for more info

Independent creators and organisations we would send a friend to. We have no affiliation with any of them, and nothing here is sponsored. Links checked 2026-10-22.

YouTubers

Garden State TortoiseAquatic and box turtle housing, ponds and seasonal careReptiles and ResearchEvidence-led husbandry: enclosure size, UVB, thermal gradients, enrichmentClint's ReptilesWhich reptile suits you, with honest care and handling verdicts

Sites

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Is your enclosure big enough?

These are the smallest sizes that give good conditions, not legal minimums. More room is always better.

Minimum 79 gallons

Every figure, and where it comes from

This is for a typical adult of about 4 in. By the same rule a large 5 in adult needs about 100 US gal. The water itself stays shallow: the volume is there to give a wide floor to walk on, not depth to swim in.

Minimum volume79 gallons
CompanyMust be housed alone. Solitary; males fight and harass tank-mates
The recognised standards do not agree on this one
The Bio Dude (common musk turtle care): At least 20 US gal of total tank capacity per 1 in of shell: 80 US gal for a 4-inch adult and 100 US gal at 5 in; or a 55 x 24 in turtle tub with 6 in of water. The figure this site uses, worked out for a 4-inch adult. It matches Austria's legal minimum for one or two adults over 4 in. Checked 2026-10-23.
Austrian legal minimum (2. Tierhaltungsverordnung, Anlage 3, Kinosternon odoratum): 79 gal for one or two turtles with a shell over 4 in (40 gal at 2.4-3.9 in, 21 gal under 2.4 in), plus 2.6-13 gal for each extra turtle by size. A legal minimum, recorded for context. Austria sets one figure for one or two turtles, so it applies to a single turtle too. Checked 2026-10-23.
Swiss legal minimum (Tierschutzverordnung, Anhang 2, Tabelle 5): A basin of 4 x 3 shell lengths, 1 shell length deep, plus land of 2 x 2 shell lengths, for up to two turtles. A legal minimum, recorded for context: for a 5-inch adult, about 20 x 15 in of water and 10 x 10 in of land, far less than the figure used here. Checked 2026-10-23.
Reptile Direct (common musk turtle care): 40 US gal minimum for one adult, and 55 US gal or more preferred as current best practice; 55 US gal minimum for a pair. Less than the figure used here. Checked 2026-10-23.
ReptiFiles (its rule for aquatic turtles, from the slider guide): 10 US gal of water per 1 in of shell: about 40 US gal at 4 in and 50 US gal at 5 in. A minimum rule for the water alone. A musk turtle needs that water spread wide and shallow, so the tank holding it is larger. Checked 2026-10-23.
Reptiles Magazine (common musk turtle care sheet): 20 US gal for one adult, and 40 US gal for a pair. A bare minimum, well below the figure used here. Checked 2026-10-23.

What it really costs

Setup, monthly, first year and across a whole life, itemised and with the electricity worked out from the actual wattage. Published figures for the same animal disagree by a factor of four, so the calculator shows ranges rather than picking one.

Can a Common Musk Turtle eat that?

Musk turtles are carnivorous bottom foragers: pellets, worms, snails and shrimp, with greens optional.

The full list: 27 foods

Never (17)

AlcoholNo safe amount at any body weight on this site.
never
AvocadoPersin. Toxic to birds and many mammals; it has not been studied in reptiles, so treat it as unsafe.
never
CaffeineCoffee, tea and energy drinks. Cardiac and neurological toxicity at tiny doses for an animal this size.
never
ChocolateTheobromine and caffeine. Small mammals and reptiles cannot clear either.
never
CitrusAcidic enough to upset the gut, and sugary. Not worth the risk.
never
Dog or cat foodToo rich in fat and protein for a turtle, and it fouls the water.
never
Fatty or processed meatDrives obesity and fatty liver, and fouls the water.
never
FirefliesLucibufagins. A single firefly has killed adult lizards. This is the most dangerous item on any reptile list and it is the one keepers do not know about.
never
Fish caught from the wildParasites and pollutants. Separately, thiaminase depends on the fish species, not where it was caught: goldfish, carp, many minnows and smelt carry it even when shop-bought, and cause vitamin B1 deficiency if fed regularly.
never
FruitNot part of a musk turtle's diet. It is a carnivore, and fruit sugar does it no good.
never
GarlicSame allium toxicity as onion, and more concentrated by weight.
never
Iceberg lettuceWater with no nutrition. It fills a turtle up in place of food that would have done something.
never
LeekAllium family. Same mechanism as onion and garlic.
never
OnionOrganosulphur compounds damage red blood cells. The whole allium family is out.
never
RhubarbOxalate load high enough to cause acute kidney injury.
never
Salty or seasoned human foodSalt, oil and seasoning. Crisps, chips, seasoned leftovers and processed meat are all out.
never
Wild-caught insectsPesticide residue and parasites, and the identification risk. Captive-bred feeders only.
never

Rare treats (2)

Goldfish and rosy red minnowsThey carry thiaminase, which destroys vitamin B1, and regular feeding causes a deficiency that can be fatal. ReptiFiles allows them as an occasional treat; they are better left out. At most a rare treat.
rare treat
Plain white fishA small piece of plain, unseasoned white fish now and then. A small piece, rarely.
rare treat

Occasional (3)

Aquatic plantsOffering aquatic plants does no harm, and they double as cover and as ladders to the surface. Optional.
occasional
CricketsA useful extra protein item. Offer a few at a time and net out any left floating. A few, occasionally.
occasional
Leafy greensMost musk turtles ignore greens, which is normal for this carnivore. Offering a few leaves does no harm; take out what is left before it fouls the water. Optional.
occasional

Everyday foods (5)

Aquatic turtle pelletsThe dependable base of the diet. Choose a carnivorous formula for musk turtles and a general aquatic formula for sliders. A portion about the size of the turtle's head: adults every two to three days, juveniles more often.
everyday food
CuttleboneFree-choice calcium. A floating piece lets the turtle take what it needs. Always available.
everyday food
EarthwormsMusk turtles are carnivores: rotate worms, snails and shrimp with a carnivorous pellet. A head-sized portion, adults every other day, hatchlings daily.
everyday food
ShrimpWhole small shrimp, rotated with worms and snails. A few, in rotation.
everyday food
SnailsWhole shelled prey, which adds calcium, and the food musk turtles hunt in the wild. Captive-bred, or from a source free of pesticides and slug pellets. A few small snails, in rotation.
everyday food

That food is not on our list. Leave it out, and remember that anything left uneaten fouls the water within hours.

Feeding in a separate tub spares the water quality, and makes it obvious how much was actually eaten.