Oh there's no doubt about that. I'd wouldn't put them in the same category as say a dovii, black nasty, or beani aggression wise. Seem to lure you into a false sense of security though then flip and kill everything you worked hard to keep with it.
My male jag that i got first week Nov grew from about 4 1/2 inches to about 8 inches now...
Female growing slow...going from about 2 inches the beginning of Aug to about 5 inches now...
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