Billo Heinzpeter Studer has been a devotee of fishes for over 20 years: 'Fishes have always fascinated me, while I also feel sympathy for them. Because they are rather neglected, and mainly attract our attention in large groups - but fishes are not vegetables!' Fishes are stranger to us than other (working) animals, and we have very limited knowledge about them and their needs. What defines a good life for a fish? Most of us have no idea. Billo Heinzpeter...