It does sing to me, despite the obvious inaccuracy.
Yellow flames indicate that the jetshark is ill, probably with an intestinal parasite that’s interfering with the methane organs. That’s dangerous for the jetshark, both because it hinders its thrust, and can cause carbon scoring and buildup along the tail. Worse, imagine if only one methane organ is infected? The damn thing will end up careening all over the marshland airspace.
I’d still buy the stamp, though.