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Salamanders
Mudpuppy
Necturus maculosus
Advanced Family Proteidae
A fully-aquatic, permanently-gilled native giant for cold-water specialists.
📋 At a glance
- Tank
- Aquatic 55 gal+ (1), cold and cycled
- Temp
- COLD 50–68°F (may need a chiller)
- Floor
- Sand or bare bottom + hides — no gravel
- Food
- Earthworms, fish, crustaceans
- Lifespan
- 20+ years
✅ Hardy and very long-lived in genuinely cold, clean water — a fascinating aquatic native.
🛒 Before you buy
- A large, COLD-water tank (a chiller in warm climates)
- Strong filtration + excellent oxygenation
- Sand/bare bottom + hides
- The knowledge they live 20+ years
A healthy one: Full, red bushy gills · well-fleshed · clear skin · calm on the bottom in cold water.
🚨 See a vet / act now if…
- Gills receding or pale
- Not eating
- Fungus or lesions
- Gasping (too warm / low oxygen)
⛔ Never
- Warm water (a killer)
- Gravel
- A poorly-oxygenated tank
Common mudpuppy questions
How hard are Mudpuppys to keep — are they good for beginners?
Advanced. A fully-aquatic, permanently-gilled native giant — for cold-water specialists.
What do Mudpuppys eat?
Earthworms, fish, crustaceans
What size tank do Mudpuppys need?
Aquatic 55 gal+ (1), cold and cycled
What temperature do Mudpuppys need?
COLD 50–68°F (may need a chiller)
What substrate do Mudpuppys need?
Sand or bare bottom + hides — no gravel
How long do Mudpuppys live?
20+ years
What are the signs Mudpuppys are sick?
See an exotics vet if you notice: Gills receding or pale; Not eating; Fungus or lesions; Gasping (too warm / low oxygen).
🧠 Myths, kindly busted
Common myths about this kind of amphibian, gently corrected — each one checked against a named source, never a pet-shop rumour.
“Axolotls are a kind of fish.”
They are actually amphibians — neotenic salamanders that keep their feathery gills and stay aquatic for life instead of transforming to live on land. Think aquatic salamander, not fish. — Animal Diversity Web
“Axolotls are fine in warm or room-temperature water.”
They are cold-water animals from cool high-altitude lakes and do best around 16–18°C, never above 24°C. Warm water stresses them and leaves them prone to illness, so many keepers use a chiller or fan in summer. — Royal Veterinary College
“Axolotls do fine sharing a tank with fish or other tankmates.”
Axolotls are solitary top predators that eat just about anything they can catch, including fish and even other axolotls. They are safest kept alone, where nothing nips their delicate gills and nothing becomes a snack. — Animal Diversity Web
🐸 Did you know? — Mudpuppy fun facts
Little true delights about the mudpuppy — each one checked against a named source, no old-wives' trivia.
- 🧬 The mudpuppy keeps its feathery red external gills for its entire life, never trading them in the way most salamanders do. Wikipedia
- 🏆 The common mudpuppy has the largest range of any fully aquatic salamander in North America. Wikipedia
- 🐸 A mother mudpuppy guards her eggs beneath a rock at least until they hatch. Wikipedia
More amphibian fun facts →
📚 More salamanders guides
🎓 Ready to go deeper?
Past the basics — genetics & morphs, responsible breeding, tankmates, and advanced setups. Same plain voice, no ceiling:
Get the free Mudpuppy Starter Kit
A one-page setup-criteria checklist and a first-30-days plan for your first mudpuppy — what to get, what makes each thing matter, and the honest bits the pet shop skips. Join the burrow and we’ll send it over. Free sheets and tools always stay open, no gatekeeping.
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Free tools for the mudpuppy
