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From my understanding the juvenile titans are supposed to have a "mustache" starting at the sides of their lips.I tried to figure this out for you - trouble is, many of the photos on Google are incorrectly ID'd. Using Fishbase, which is typically more accurate, it looks like juvenile titan triggers have transverse lines above their eyes, while yellow margin juveniles are just spotted there. Pineapple trigger is just another name for yellow margin i think.
So - IMO, these are juvenile titans.
Jay