This fascinating color palette also belongs to some incredible species, as you’ll see here on our list of the top 12 blue ...

They turned brighter and darker in color too—like male bettas ... every letter of the betta-fish genome now. We can pinpoint the genes that make the fish royal blue versus steel blue.

DEAR NOLA’S MOM: These peppy little fish, also known as Siamese fighting fish are customarily kept as solo pets. The main colors include: blue, red, turquoise, yellow, white and orange — and ...

In Thailand, people call betta fish "pla kat," which means "fighting fish," and it couldn't be a more appropriate name. Male bettas are known fighters, aggressively flaring their gill covers and ...

This dark green male was a challenge to photograph ... In this shot, a red betta appears to become a bird of paradise. Siamese fighting fish evolved to tolerate stagnant or slow-moving water ...

Scientists found that the fish were gradually domesticated ... able to create dozens of different varieties of betta. There are red, yellow and blue bettas, bettas with big fins and small fins ...

The critically endangered fish, discovered in the commercial aquarium trade, can only be found in one forest swamp on Sumatra, Indonesia.