With this completely revised edition of one of the most successful aquarium fish books of the last decade, a new important chapter in the history of the aquarium hobby has been written. This book covers all L-Numbers from 1 to 350 and all LDA-Numbers from 1 to 76 on 272 pages. All important information and care instructions are given under the photos with international symbols. The explanation of the symbols is given in 10 different languages inside the book. Sucker-mouth catfishes (scientific name: Loricariidae) are given an L or LDA number if they are imported for the aquarium hobby but cannot be unequivocally assigned to any described species. Due to the immense individual variation in coloration and body-shape of the particular species it is often difficult to identify them. Thus more than 1.800 photographs have been used to solve this problem. This book is accepted worldwide as reference work for dealers, breeders and all aquarists who enjoy keeping these wonderful fishes.