What Category is a Fish Considered? An In-Depth Biological Look
                                
                                
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                                    4 min read                                
                            
                                With approximately 50 percent of all living vertebrates being fish, their biological classification is a complex and fascinating topic. While many people simply refer to them as 'fish,' this aquatic life-form actually represents a diverse group of animals with varying characteristics, and is not a single taxonomic class in modern phylogeny.