The first comprehensive reference book with all anabantoid fishes on 650 full color photographs. Plus all snakeheads, nandids, and related families that show many behavioral parallels to labyrinths or anabantoids. Further, this book provides a determination key to the genera Betta. This book became immediately the No. 1 identification lexicon of Betta societies the world over! All AQUALOG -reference books introduce each fish (incl. breeding forms etc.)with at least one color photo and a short description. The ingenious code number system labels every known or newly discovered fish with an individual code number. This number re mains, despite any scientific renaming. Moreover, it enables you to communicate internationally about any fish without the danger of confusion regarding local names!