Caridina multidentata Morphology and Size

Caridina multidentata, commonly known as Amano shrimp, are freshwater invertebrates belonging to the family Atyidae. They are popular in the aquarium hobby due to their algae-eating capabilities and peaceful nature. Their physical characteristics are important for identification and care.

External Anatomy

Cephalothorax: The fused head and thorax are covered by a carapace.
Abdomen: Segmented and flexible, allowing for movement.
Appendages: Include antennae, antennules, pereiopods (walking legs), and pleopods (swimming legs).
Coloration: Generally translucent gray to brownish, with small, evenly distributed dots or dashes along the sides. These patterns vary among individuals.

Typical Dimensions

These shrimp display sexual dimorphism; mature females tend to be larger than mature males.

Adult Length: Mature specimens commonly achieve lengths between 3 and 5 centimeters.
Size Variation: Environmental factors, such as food availability and tank size, can influence final individual size.

Factors Affecting Development

Several environmental and biological conditions influence the attainment of full size.

Diet: A varied diet, supplemented with algae and biofilm, promotes healthy growth.
Water Quality: Stable water parameters, including appropriate temperature and pH, are critical for molting and overall development.
Molting: Growth occurs through a series of molts, where the exoskeleton is shed and replaced with a larger one. Successful molting is essential for achieving maximum dimensions.
Tank Size: Sufficient space allows individuals to reach their full potential. Overcrowding can stunt development.

Distinguishing Features & Identification

Careful observation of anatomical characteristics is necessary to differentiate them from similar shrimp species.

Dorsal Stripe: Lacks a prominent dorsal stripe, unlike some other Caridina species.
Dot/Dash Pattern: The even distribution of markings along the sides distinguishes them from shrimp with irregular patterns.