What is the Actinopterygii?
Q: What is the Actinopterygii?
A: The Actinopterygii is the class of ray-finned fishes.
Q: Why are they called ray-finned fishes?
A: They are called ray-finned fishes because they have lepidotrichia or "fin rays".
Q: What is the difference between the fins of ray-finned fishes and Sarcopterygii?
A: The fins of ray-finned fishes are webs of skin held by bony or horny spines ("rays"), while the Sarcopterygii have fleshy fins.
Q: Are Actinopterygians the largest class of vertebrates?
A: Yes, Actinopterygians are the largest class of vertebrates.
Q: How many species of Actinopterygians are there?
A: There are nearly 25,000 species of Actinopterygians.
Q: Where can Actinopterygians be found?
A: Actinopterygians can be found in both fresh water and marine environments, from the deep sea to the highest mountain streams.
Q: What is the most common type of Actinopterygian?
A: Most of the living species of Actinopterygians are teleosts.
