Anemonefish is the favorite fish of all divers. This small (10cm) fish lives in symbiosis with stinging sea anemones to which they are resistant. The anemone is their home and in return they watchfully patrol the immediate area driving away potential attackers. Being only a 10-centimetre fish makes it difficult to be an effective ‘bodyguard’ so when it gets really hot they immediately flee inside the anemone. Papua New Guinea.