I tried this and they love it! I bought the frozen pack initially just for the peas, but I decided to try corn too and they love it. Just like peas, I put the frozen in a microwave safe bowl with water and put them for 20-25 secs high heat until I can hear the peas are about to explode then just like the peas, I peel the outer skin of the corn and just throw them in... for my smaller fish, I always break it into quarters or halves...

how do you peel corn? wouldn't it just turn out to be mush?

No they won't be mushy as long as you put them underwater when you microwave it, it doesn't have to be cooked as long as they're soft or before they explode lol...

Peeling them is just like you would do the peas after microwaving them. But instead of squeezing it like with the peas, you probably can use your nail to take off the transparent, tough-to-digest outer skin

I thought about giving my fish corn, but is the high starch content good for them? I always have it around so it would be convenient.

Make sure the corn is actually cooked first... you know like the frozen ones in the bag.

I think corn can make the gf appear goldish in color... my baby ranchu looks yellowish on his head part.