It is more going to be when is a fish going to getting eaten, as opposed to if a fish will get eaten.
For me,
Tan haddoni -- have had it for 12+ years -- yellow watchman goby & clean up crew
Red haddoni -- have had it for about 4 months now -- only eaten clean up crew
Green Haddoni -- have had for about 3 years now -- ate a Golden dwarf angel -- mainly because the angel and the pink skunk pair would fight & clean up crew
Green with purple rim Haddoni -- had for about 1.5 years -- only eaten clean crew
Ones I no longer have
Green striped haddoni -- had for about 2 years before I sold it -- ate a newly introduced flameback angel, was chased into it & clean up crew
Blue Haddoni -- had for about 4 years before I lost it --- Mandarin & clean up crew.