Definition
Percoidea is a suborder within the larger group Percomorphi, representing a significant portion of ray-finned fishes. They're diverse in form, habitat, and behavior, showcasing evolutionary success. They typically have spiny fins and a swim bladder. Think of Percoidea as a middle management level in the fish hierarchy, bridging different types. They're found in marine and freshwater environments worldwide. They represent a core group of 'perch-like' fishes.