ok first one ctenolucius hujeta hujeta is often called the slant nosed gar or silver barracuda although it is not related to gar there very tricky to get off feeders. the can injure there "noses" very easily because they're so skittish. they love current, there's a breif summery of hujeta
and about the red tail "barracuda" like messiner said is a charcin. the info is quite differnent from site to site but what i gather is that there also skittish and like the hujeta can injure the self the red tail is the member of the ace family, im not sure but i think the red tail is falco? they as well are hard to get off feeders . current loving . thats pretty much it.