I bought a Koi betta that was labeled male from one of my LFSs. I noticed that it doesn’t behave like my other males when their tanks are placed side by side. I’m not sure if he’s just very young, or if it’s really a she. I’m debating introducing into my female tank, but I want to be absolutely sure before I do. My female is a very calm, docile fish, so I don’t want it to harm her in any way. I’ve looked for an egg spot but this koi spends most of its time hiding under the plant, on the rocks, so it’s hard to get a good view of its belly... here are a couple pics to see if anyone can plz me help determine its gender... thanks in advance!