What is the highest taxonomic rank indicating *Pristella maxillaris* is multicellular and heterotrophic?
Answer
Kingdom Animalia
The placement of *Pristella maxillaris* within the Kingdom Animalia signifies its fundamental biological structure as a multicellular organism that obtains energy by consuming other organisms (heterotrophic). This is the broadest classification level mentioned that defines its basic life characteristics. Below this, the Phylum Chordata specifies the presence of a notochord that develops into a vertebral column, and the Class Actinopterygii further refines its characteristics to those of ray-finned fish. Kingdom Animalia establishes the essential criteria for life form—being composed of many cells and requiring external nutrition—before detailing the specifics of its evolutionary lineage.

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