Those are certainly "gems" . I am horrible with fish id, what are they?
Some type of Veija, which are not my strong point - i'm guessing malicauda......or a different locale of synspilum......definitely not Breidhordi, but who knows.....this genus varies ssoooooooo much depending on locales, I don't even recognize certain locle Synspilums because I always picture my own, but they are so different looking.
A very good question LOL What indeed, OP?
EDIT: Nevermind, definitely not a Blackbelt - maybe Hartwegi? Also looks like Bifasciatus or Heterospilus.
Viejas = Pain in the _______