What Is This Fish?

[CTGoldfish]

Recently I have caught a fish that was swimming through a brook near me (In Connecticut usa) and I was hoping someone can take shot at what it is
It has a black stripe straight down the middle and is greenish-gold on top with a white/cream underbelly
I believe it is some type of minnow its about 1 and a half inches and for some reason I have saw it chase my baby bluegills which most are larger than it and it constantly forages for food,any ideas what it is?please help

 

[loraxchick]

black nose dace? (first species of brook fish that comes to mind having a stripe-im in NY and the species should be similar if not the same). other common small brook fish are creek chub, a variety of darter species(bottom dwellers) or trout fry. id have a search for dace species first and see if that is what you have. a picture would be very very helpful in identifying the fish.
cheers

 

[CTGoldfish]

oops double reply somehow!

 

[CTGoldfish]

He committed suicide,jumping out the tank!
Sad faces..............