I’m not exactly sure what is the best resource for all of the silver dollar species are but I am interested in finding out more myself as well. I have really fallen in love with silver dollars over the last year or so. Currently I have m. Setiger aka rainbow pacu and tometes kranponha aka hairy pacu. Both are fairly uncommon in the hobby but I really enjoy them adding movement to the tank and cleaning up a lot of the refuse of the other fish. We all know how the bass can gorge themselves to the point of spitting up food 10-15 mins after their feeding- always good to have something that will eat that lol.I believe they are Myleus Rubripinnis Luna. Seeing those photos I posted that seems incorrect but they are older photos and all three of them now display the orange and yellow blotches on their sides. That's just my guess, I don't know much about silver dollar identification or how many species there are but I will post some updated pictures when I get the chance. Is there a good resource for all the different silver dollar species just out of curiosity?