Divers know that the splendour of luminous colours loses its charisma with each additional centimetre of water depth. The essential things remain: a well-styled body in which you must also, if necessary, protect yourself against the attacks of others. The artist Luise Terletzki-Scherf captured the porcupine fish in its characteristic threatening gesture. To this end, the small coral reef inhabitant puffs up its whole body plus prickles out to form a considerable volume.