Are Mollies Known For Fin-Nipping?

[maliciousnic]

I have a 37 gallon tank with 1 9-inch Pleco, 6 Zebra Danios, 3 Peppered Cory, 1 Albino Cory, 1 Dalmation Molly, and 1 black Molly. I've had the Mollies, Danios, and Peppered Corys for maybe 3 or 4 months now, originally went in just for some more Albino Corys so that my existing one wouldn't be lonely, his buddy died a month prior. They didn't have any Albinos so I got Peppered ones instead. Everyone was getting along great, now I've noticed that ALL of my Corys have had their fins nipped, the most severe is the Albino, my poor little guy has NO fins left . Could it be the two Mollies doing it? I would imagine that if it was the Danios they would have munched the Mollies fins as well, not just the Corys, but the Corys are the only ones getting nipped. No one harasses anyone else when I'm watching, so I don't know who it is for sure.

 

[basboi85]

My mate had danio's and they nipped her other fish's fins and I've not seen any fin nipping in my tank and I have at at least 15 adult mollies in my tank. The only time they get abit heavy handed is

1. Feeding time
2. The males are digging each other away from the females to stop them mating.

Either than that my Mollys are quite peaceful and I even let my 2 kids hold their hands in my tank. 6 + 2 years old ( after being cleaned vigorously ) and they gently peck their hands
So I couldn't imagine it to be Molly's but I could be proven wrong

 

[maliciousnic]

I was just talking to my mom online and she suggested it was the Danios, to which I responded "those jerks!" lol. My Mollys like to peck at my arms and hands when I'm replanting everything after I've done the cleaning and such, silly fish. I don't know what made the Danios start munching on my Corys fins, but if it doesn't stop, the Danios will have to go somewhere else.

 

[crazyforcordoras]

My friend used to have this zebra danio that was extremely aggressive. An extreme fin nipper.