I believe there are two versions going around with slightly different symbols.  I  wrote what felt most likely for the one posted by Q.  You've brought some additional ideas. I think "Remember, humans" aa a warning is a good interpretation of this.  Mostly this is a symbolic war flag being waved in our faces. A "Get down slave, we're still in charge" taunt.  The dolphin is also used by French Royal houses as well as some other possibilities. Edit: I believe most of us know the "cake" is a lie - but it continues to strongly invoke Marie A.