Male bettas are nicknamed Siamese fighting fish for a reason: They're very aggressive with one another and with female bettas. They are violent enough to lower their expected lifespans.

Betta fish—also known as Siamese fighting fish—are among the oldest ... Before mating, the male spends hours blowing bubbles at the water’s surface to build what’s called a mucus bubble ...

Known as Siamese fighting fish (Betta splendens ... But in the wild, the number of survivors is much lower. Male betta fish are the primary caregivers when it comes to betta babies — they build the ...