What is a Caridina shrimp?

Taxonomically, Caridina shrimp are organisms under the genus Caridina. Below is a table on the full scientific classification of a Caridina species, Caridina caerulea.

Taxonomic Rank  Classification  Physical characteristics
 Domain   Eukaryota  Cells contain membrane-bound structures (organelles).
 Kingdom   Animalia   Cells lack cell walls; Multicellular with few exceptions; Heterotrophic; Motile in some form.
Phylum  Arthropoda   Lack vertebrae; Segmented body; Jointed limbs; Chitinous exoskeleton.
 Subphylum   Crustacea  Biramous limbs; Nauplius larvae.
 Class  Malacostraca  19-20 segments: cephalon (5), thorax (8), abdomen (6-7).
 Subclass  Eumalacostraca  19 segments:  cephalon (5), thorax (8), abdomen (6).
 Superorder   Eucarida Capace fused to all thoracic segments; Stalked eyes. 
 Order Decapoda  10 legs; Full carapace.
 Suborder Pleocyemata  Eggs incubated on female’s pleopods.
 Infraorder Caridea  2nd abdominal somite overlaps adjacent; 2 pairs of chelate pereiopods; Complex larval stages; Lamellar gill structure.
 Superfamily  Atyoidea  Mature form inhabits freshwater, few exceptions.
Family Atyidae  Chelae have brushes.
 Genus  Caridina  (Mainly in subtropical and tropical freshwater habitats). 
 Species  Caridina caerulea  Full species description.

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