Yep, they're all Xiphophorus helleri (maybe some others hybridized in, who knows). I've seen some pretty ugly sword strain crosses though. Very muddy orange and yellow/brown colors. Who knows, you might produce some nice ones though
Yeah I really wasn't serious. But still why breed swordtails when you're just going to feed them to your angels. You should use guppies for that. Anyway for a while I just crushed up flakes and they did fine.