a fat betta fish
They look just like Big betta fish, but smaller.
it looks like they have a big bubble in their side
Betta dish actually don't sleep, or they'd die.
a male Betta will usually like the company of other fish but will fight or kill others of their kind also they might fight guppies cause they look similar to a female Betta.
They look all gooey ang have a wierd coat around them
They Get there names buy the people that found them or how it looks like....Like betta means fight and that is why too....
I am not sure but it could be a certain type of Goldfish or Betta. I think you know what a Betta is or you could look it up. Betta fish are called Siamese fighting fish so that makes sense in a way. You should look up "yin yang fish" because it seems there is truly such thing that people talk about. Maybe you meant yin yang but there seems to be very little information on yin yan fish. From all the images of this yin yan or yin yang fish it looks like either a Goldfish or a Betta.
Bettas are originally from Thailand. Although, they don't look as beautiful and colorful as you would see them at your local pet store. In the wild, they are brown or black and have short tails so they look like slugs.
A dying betta fish may appear lethargic, have clamped fins, faded color, and may struggle to swim or breathe. Signs of distress in a betta fish include loss of appetite, gasping at the water's surface, unusual swimming behavior, and visible physical injuries or abnormalities. It is important to monitor your betta fish closely for any of these signs and seek veterinary care if needed.
A male betta has a long flowing tail while a female has a short tail
Usually, they won't have big beautiful tails. They have smaller bodies in general also.
Betta are the best for you.They look awesome and are friendly