What is the Golden Jellyfish thought bubble about?

[snabul]

Hello, I am curious, what the golden JellyFish thought bubble is about. Most Icons that hover over Sims heads when they sleep have a "meaning". They refer to "Topics", or gossip, or traits, or moodlets and so forth.
I have been searching for eight weeks now, but I can not find the meaning of the "golden Jelly Fish". It is not a lifetime wish. Maybe it is a basegame wish, but I do not find a complete list of all wishes showing the according icons. ;-) Does someone know what the golden jelly fish is about?

sorry for my bad english and the german Auto correction ;-)

[MrsFlynn]

It's never really been explained what the thought bubbles are suppose to mean. However, it could be related to their traits, wishes or just what they'd like to do.

Maybe the Sim is skilled in fishing and has a desire to catch a golden jellyfish.

[Aele Tralsicaa]

It's just a jellyfish, sims can protest about it too