spotted gar florida gar

What is a Long Nosed Gar MAX Size in Captivity? I've been told 6-7 foot, but I thought they stuck around 30 inch max similar sizes to Floridas/ Spotted gars

Hi this is my first time being part of a forum or whatever so please forgive me if I have trouble using this. Ok so my question is if there's any size difference or something between a spotted and Florida gar because I'm planning on getting one for my pond but I'm never finding the info I want...