Just fed my Oscar the roe sacks from the smaller female sea trout we caught the other day, we always realease bigger females.
He eats shrimp, mud minnows , June bugs, cicadas, Japanese beetles, anoles, geckos, cichlids cull fry and even some pellets. Total garbage disposal. He can’t catch cichlids very well so I hand feed those to him usually. Nevertheless he has about a dozen “roommates” at this point. Healthiest Oscar I’ve ever had.