Help w/ Fish ID (pic inside)

[jbarr]

Hi all, I was on a vacation and I came home to see that my younger sister had put some new fish in my tank. I didn't mind so much, I suppose, until she told me she caught them at our lake.

Since they've been in my tank a few days now and they seem to be eating and getting a long just fine, I thought I'd let them be.

I was just curious, can anyone ID these fish??

My dad projected they were Northern Pike minnows. But I'm not sure...


Here's the pic, I pasted 2 together, so that explains the size comparison.
They are about 2.5 in.

 

[hc8719]

no idea what they are

what state are they from, i have 2 lakes in michigan, and ive never seen them before

i know your from MN, but i dunno if your lake is outta state like mine

 

[Mosaic]

Well, if they're pike minnows, this is what you're in for:

But yours don't have a forked tail fin, so I don't think that's it. My best guess is a topminnow or killifish, but I don't know which species. I thought there was a feature on fishbase where you could look up a fish by description?

They kinda look like Umbra limi, at least the shape as far as I can tell.

 

[hc8719]

also note, if you dont let these fish go now, you'll have to keep them all winter and most a spring too, you just cant let them go in in the middle of january, or even march when theres still snow on the ground

 

[JDogg]

i think it might be a banded killifish Fundulus diaphanus

http://www.gen.umn.edu/research/fish/fishes/banded_killifish.html

 

[jbarr]

My lake is in MN, and don't worry I'm prepared to keep these. Getting a new tank winter-time.

Good guesses, I think it might be a Banded Killifish, Jdogg.
Though it does resemble the Umbra Limi...

Really appreciate it though. Interesting. Thanks

 

[Toirtis]

Does look like an American killie.

 

[Mosaic]

I'd say the American killie too. That's a pretty close match. The markings and dorsal are much closer than my guess.