Swamp dwarf crayfish
Cambarellus puer
Also known as Striped dwarf crayfish, Mini lobster
Care at a glance
- Temperature
- 64–79°F (18–26°C)
- pH
- 6.5–8.0
- Adult size
- 1.2 in (3 cm)
- Minimum tank
- 5 gal (20 L)
- Temperament
- Mostly peaceful
- Social behavior
- Solitary
- Tankmates
- Tankmates with caution
- Swim level
- Bottom
- Difficulty
- Easy
- Breeding
- Easy
- Rarity
- Common
- Origin
- Mississippi valley swamps, southern United States
- Family
- Cambaridae
Overview
A striped nano crayfish that holds its own in a planted tank beside shrimp and small fish without hunting them. Keep a colony in 20 liters with leaf litter, plants and small caves. It needs no heater in a normal room and breeds without help. Feed sinking pellets, blanched vegetables and occasional frozen food. Keep it away from slow, long-finned fish, which are the one thing it will pester.
In the wild
Cambarellus puer lives in the swamps and backwaters of the Mississippi valley in the southern United States, in warm, still, heavily vegetated water. Keep it at 18 to 26 degrees Celsius and pH 6.5 to 8.0, with cover and enough hardness to build a shell.
Good to know
Cambarellus puer reaches about 3 centimeters and carries dark lateral striping along the body. Females carry eggs and then miniature crayfish under the abdomen. Molting is when it grows and when it is most vulnerable, so a crayfish that has vanished for a few days is usually hiding under cover with a soft shell.
Did you know
Puer means boy in Latin, a describer's joke about a crayfish that never grows up.
Common questions
What size tank does a Swamp dwarf crayfish need?
A Swamp dwarf crayfish needs at least 5 gal (20 L). It spends most of its time in the bottom.
What temperature and pH do Swamp dwarf crayfish need?
Swamp dwarf crayfish are comfortable at 64–79°F (18–26°C) with a pH of 6.5–8.0.
How big do Swamp dwarf crayfish get?
An adult Swamp dwarf crayfish reaches about 1.2 in (3 cm).
Where to buy
Some links may not be the exact species or variety.
…or ask your local fish store.
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Related species

Brazos dwarf crayfish
Cambarellus texanusFreshwater1.4 in (3.5 cm)5 gal (20 L)64–79°F (18–26°C)Least dwarf crayfish
Cambarellus diminutusFreshwater1 in (2.5 cm)5 gal (20 L)64–79°F (18–26°C)
Cajun dwarf crayfish
Cambarellus shufeldtiiFreshwater1.6 in (4 cm)5 gal (20 L)64–79°F (18–26°C)
Orange dwarf crayfish
Cambarellus patzcuarensisFreshwater2 in (5 cm)10 gal (38 L)64–77°F (18–25°C)
Marbled crayfish
Procambarus virginalisFreshwater3.9 in (10 cm)20 gal (75 L)64–77°F (18–25°C)
Electric blue crayfish
Procambarus alleniFreshwater4.7 in (12 cm)20 gal (75 L)68–81°F (20–27°C)
