Crown Shrimp

Caridina logemanni

Animalia›Arthropoda›Malacostraca›Decapoda›Atyidae

Crown Shrimp (Caridina logemanni) is a striking freshwater shrimp featuring a distinctive crown-like pattern of dark bands or spots across its carapace and body, with coloration ranging from reddish-brown to deep burgundy. This ornamental variety is prized by aquarists for its bold patterning and relatively hardy nature compared to other Caridina species. The crown marking becomes more pronounced as the shrimp matures, making it an attractive centerpiece for planted nano tanks.

Where it's from

Recorded as introduced in Norway

At a glance

Size: 1.5 in; 4 cm
Min tank: 5 gal; 19 L
Group: 10+
Temp: 72–79°F; 22–26°C
pH: 5.5-6.5
GH: 71–107 ppm; 4–6 dGH
Temperament: Peaceful
Swims: Bottom
Lifespan: 1-2 yrs

Ammonia 0 ppm and nitrate under 20 ppm.

Care

Diet

Crown Shrimp are detritivores that graze on biofilm, algae, and decaying plant matter throughout the day. Supplement with high-quality shrimp-specific foods such as Shirakura or Mosura pellets 2-3 times weekly, and offer blanched vegetables like spinach, zucchini, or cucumber occasionally. Ensure adequate mineral content through food and water parameters to support molting.

Behavior

Crown Shrimp are active grazers that spend most of their time foraging on substrate and plant surfaces, particularly in low-light conditions. They are social and thrive in colonies where they exhibit natural behaviors including molting cycles every 4-6 weeks. Males may display mild competition during breeding season but remain non-aggressive toward females and other colony members.

Breeding

Crown Shrimp require soft, acidic water (pH 5.5-6.5, GH 4-6) to breed successfully, as harder water inhibits reproduction. Females produce small batches of 20-30 shrimplets that develop fully in the mother's saddle before being released as miniature adults. High water quality and stable parameters are essential; even slight pH or hardness fluctuations can cause breeding failure or molting issues.

Tank mates

See all 6

Otocinclus

Small, peaceful algae-eater that shares bottom-dwelling niche without competing or predating

excellent

Ember Tetra

Tiny, non-aggressive fish that occupy mid-water column and do not prey on adult shrimp

good

Chili Rasbora

Nano fish with minimal bioload and peaceful temperament, ideal for small planted tanks

good

Amano Shrimp

Larger shrimp species that coexist peacefully; may occasionally consume shrimplets

good

Java Moss

Provides grazing surface, shelter for shrimplets, and biofilm production

excellent

No state or federal restrictions on record.

Not legal advice, and possibly incomplete or out of date. Rules vary by state and change over time; check with your state wildlife or agriculture agency before buying, keeping or shipping it.

The care information here is written with AI help, so it can contain mistakes. Spot one? Tell us and we'll fix it. Native range: Global Register of Invasive and Introduced Species (CC BY 4.0).