Re: gonna be a brook trout in here
I think what Trumper said will improve it, some darks definitelty to create more shadow. There is a lot of mid tone in it. The rocks on the bottom could be a bit sharper in clarity with darks and lights and some of the weeds are a bit "all the same". Perhaps some variation in the weed colour (even if that isn't showing in the reference). The fish looks a little like he has been frozen in time, so maybe some signal of water movement near him may help so that he doesn't look stunned. These are the things that I would change if it was my painting, so it's just my opinion. It is coming along nicely and it doesn't need much. Good luck and looking forward to seeing the finished result. Cheers and best wishes. Debs. =))
you can do anything you put your mind to positively.