It looks good and breaks up the expected pattern...adds some interest over and above the main piece.

Not everyone is the same in any species, so just consider your fish unique and special. Definitely not evident at first, or second glance. Love it.

You did a really great job! No one is going to notice your mistake...don't make a bigger mess trying to fix such a tiny error. Call it creative license! LOL

The boobo just keeps one humble. The bright colors are so happy and make me feel good just looking at it. You made a beautiful quilt.

That is not a mistake - it is your special design element!!!! I agree that it has the feel of a school of fish.

Love it the colors and the pattern are awesome. Mistakes are part of life and add to the charm.

Beautiful quilt!! Took me a while to find the goof, and I like it.

Nice quilt.

I guess I'm the odd man out! I would fix it if that were possible. Now that you know it is there, that is the first place you will look, and it takes away from the all-over optical illusion. Sorry!
The quilt is way too beautiful to leave that. An applique of the correct piece over that spot won't be noticed.