"How to Jellyfish" is a reference book for jellyfish keepers and those who want to become one but don't really know where to start. The application contains useful information on jellyfish species that have been successfully kept in aquariums up to now, numerous instructions (e.g. food breeding, creating salt water or how to properly transfer jellyfish to an aquarium), information on selected dangerous species, various aquariums or the initial equipment. Particularly noteworthy is the jellyfish doctor section, which lists "symptoms" of jellyfish and provides possible causes and suggested solutions.

The app is constantly being updated with useful information. An English language version is planned!