While it is common for pet betta fish to lose fins, according to the experts, it is not normal. Either fin rot (which is caused by an infection) or fin loss (caused by external factors ...

So, a three-inch betta fish would need at ... tankmate as an easy meal and attack its tail and fins, leading to further stress. Petco notes that fin rot is contagious. While you identify the ...

Owners should also watch out for infection and diseases such as fin rot, dropsy, and swim bladder disease. While Betta fish can tolerate dirty water for a short period, long exposure can cause ...

Either fin rot (which is caused by an infection ... or missing if they are attacked by another fish. If your betta is sharing a tank, tail biting can also be an issue he said, explaining that ...