鱼有一颗心仅有七秒情猫有九条命唯有一颗心
[yú yŏu yī kē xīn jĭn yŏu qī miăo qíng māo yŏu jiŭ tiáo mìng wéi yŏu yī kē xīn]
The fish is widely believed to only have a memory span of seven seconds (which is actually a misconception), while it is generally recognized that cats are resilient creatures with rich emotions like love and attachment; thus, this internet username seems to convey both a sense of impermanence as well as profound affection. It possibly implies the user wishes to cherish each moment with full intensity despite fleeting life moments.