What characteristic defines the placement of the Yellow Tang in Class Actinopterygii?
Answer
Bony rays supporting their fins.
The classification of the Yellow Tang into the Class Actinopterygii signifies a major division within fish taxonomy based on skeletal structure relating to propulsion. Actinopterygii translates directly to 'ray-finned fishes.' This class is characterized by the presence of bony rays that serve as the structural support elements within their fins, allowing for precise movement and maneuvering. This placement is significant because it immediately separates the Yellow Tang from groups like cartilaginous fishes, such as sharks and rays (Class Chondrichthyes), which possess different skeletal compositions and fin structures. This class encompasses the vast majority of all modern fish species.
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