This group of fish is called bony fish, and date back approximately 395 million years. They belong to a very important Class of animals: Osteichthyes, (meaning bony fish), that are divided into 2 subclasses: Ray-finned fishes, Actinopterygii; and Lobed-finned fishes, Sarcopterygii. Osteichthyes is an important group because about 90-95% of all fish are Bony fish and account for approximately 50% of all vertebrates.
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