Got it from Predatory Fins. Also checked and both species are identical as juvis so..hard to say on both of our endsDon't mean to hijack the thread at all, but this looks to be S. franciscanus, not S. brasiliensis due to the flat profile of the head/upper jaw. S. brasiliensis have a much more curved profile to the head/upper jaw
I wouldn't rely on predatory fins for an accurate ID of any species really, let alone dorados. https://www.monsterfishkeepers.com/forums/threads/dorado-salminus-id-and-care-guide-1-1.538979/Got it from Predatory Fins. Also checked and both species are identical as juvis so..hard to say on both of our ends