Bettas are tropical/warm water, goldfish are coolwater. Plus goldfish need a huge tank, and bettas dont usually like too big (5-10 gallons is great for them).
Originally Posted by Shenjall
How can I tell the sex of my betta? (my dd named her daisy and said she's a girl, but I have no idea)
I think my goldfish is a Calico goldfish. Is that a fancy tail one? He (just a guess, ds named him Sargent Moody) doesnt have a big fancy tail, but it has white on the end. I'll have to take a pic for you guys.