My experience.....
Well.... My goldfish took three or four days to figure out the ghost shrimp were edible, then Bam! (as a certain culinary celeb would say) Shrimp Tartar was on the menu. These are teeny feeder goldies... well, not so teeny since the shrimp dinners, lol. Nope, I don't recommend the ghost shrimp except as an occasional dietary supplement.