Oh that's good. Now I will not hafta bust out the taxonomy books, lol.
I would think that a marron would be aggressive enough to hold their own w/ a lion. But just know that a marroon female can get very large and around 6 years old will loose her stripes.
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Yeah, maroons are very territorial and aggressive fish. IMO, just about any fish that can't get swallowed, can hold its own with a lion. I don't consider a lion to be aggressive, just a large predator. They seldom will bother fish they can't swallow whole., and they can swallow a surprisingly large fish.