So, about a week ago I got a beautiful betta. The cup said he was a veiltail, but he looks kind of like a Halfmoon Double tail. Anyway, he seems like a happy fish and is constantly exploring his 2.5 gallon tank, occasionally hiding under one of his plants.
Today I came home after school and checked on my fish. (found 7 guppy fry in my community tank). And saw that dorsal fin was a bit shredded. I'm not entirely sure if he was biting his fins (or if it's even possible for them to chew on their dorsal fins?)
All I have in the tank is two plastic plants, one with broad green/red leaves (thought he might like it because the leaves curve down on the bottom level and create a bit of a tunnel for him. Also the leaves are broad enough for him to lay on.) the other is green with very short frayed leaves. the only other thing, (besides a bubbler) was a little hollow castle. It does have some slightly pointy spire-ish things and the tunnel doesn't look big enough for him to hide in... I took that out thinking it could possible be the culprit.
So anyway I was just wondering if someone could help me figure out if he is a tail biter and help me find out why he is biting/ how to make it better.