in the livebearer tank, its definitely Big Momma, the marbled lyretail molly. she's the biggest fish in the tank (around 3+ inches). if she doesn't approve of a new male, she lets him know, she sets the other females in their place, and other fish as well (the poor balloon mollies, first day in the tank she pushed them around literally all day, chased the guppies around for a day too). she's the first to eat, will even pushthe cory cats away from sinking wafers and pellets. she's one tough cookie though, survived new tank syndrome (one of the first fish i bought), changing tanks, and moving.
in the tetra tank, its the single guppy fry. she's smaller than the smallest glo-light, but she doesn't let anyone get to the food before her (you go girl).
in teh big tank, its the bigger gold gourami, who i think may be female, still figuring that out. she is the first to eat, she chases everyone else around the tank, even goes after sharky (he just hides), bugs the hatchetfish, spits at me, and flicks the thermometer against the glass whenever i'm in the living room (she's an attention pig). god forbid the day she decides to take on the bumblebee cat once he's bigger. if he does eat a fish, it will probably be her
and in the puffer tank, its paula, the female. when they wre in spawning mode, she'd charge out from behind the plant and at me through the glass. she's another tought little cookie.