You know your cory catfish is stressed if it exhibits any of the following signs of stress:
- Frantic swimming
- Odd swimming patterns, for example, swimming upside down
- Refusal to eat
- Gasping at the surface
- Pale or whitish color
- White spots on the body
- Discolored gills
- Rapid gill movement
- Hiding almost all the time
Your cory catfish might be stressed due to improper acclimatization, poor tank conditions, aggressive tank mates, or lack of food. Take action immediately before they become ill or die.
In order to keep your cory catfish happy, keep them in groups of six or more, feed them a proper diet, clean and maintain the tank regularly, and separate them from aggressive tank mates.