For some reason,I cross bred from here to the moon on my old file...
Yet,somehow the first time I crossbred on my 2nd file,I created fragiles.
3rd file,same situation,but I even clicked the 'Help'(Gives you free fish),yet I had fragiles and still didn't get the "You got fragiles blah blah blah* window.
And yet,beforehand,I had the "Staring at fish dosn't make them grow" message.

So,I guess the stare at fish message disables the fragle message.