Of course the app in scope and abundance of images can not keep up with the Debelius'schen "Atlas of marine fish", whether of the sheer number of photos downright kills one. But convincing structure and functionality after a short adjustment period. Beautiful, mostly clear photographs showing the shooting location to show a large variety of fish in the Indian Ocean and the Red Sea without raising a claim to be complete. Quick one can view the area of ​​distribution of each fish can (internet connection required). Very simple is a description of the family or species called in German and English. Also register with Latin, English and German names is extremely functional and easier to find, if the name of the fish is known.
The fish identification, especially on holiday, is on the tablet easier and more fun, so 5 stars.