What categorizes a body of water as a lake in New Leaf?

[TaintedTerror]

Probably the dumbest question ever, but I'm at a loss here. I can't find any of the lake fish, and it's really irking me. I figured the area where the waterfall leaks into that starts the river would be one, but I'm still having no luck.

 

[ben_nyc]

Look for those little bodies of water!

 

[AnEndlessOcean]

I'm pretty sure it's the part of the river where it's at its widest and is rounded...if you need a picture, I could probably find an example.

 

[AoJones]

I'm pretty sure it's the part of the river where it's at its widest and is rounded...if you need a picture, I could probably find an example.

this^

It's those points in the river where it becomes wide and rounded (however it isn't the waterfall parts).

 

[Yurusumaji]

 

[AoJones]

Off topic* I must say nice town you have there.