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It looks like a big beast to me, and a large aquarium would be needed to keep one of those. That is probably why they are being released when they start to grow too big for a fish keeper's aquarium.
It is wrong, and presumably against the law, to release an alien species into the local environment. I can believe these catfish are doing a lot of harm in Florida. If these catfish are being hunted, that should help to keep the population down, but education is also needed. When fish keepers are buying these catfish they should be informed how big it is likely to grow and must be clearly told not to release them into the wild.
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