What was the hardest fish got you to catch/find?

[Roxer9000]

I'm bored. Story time!
Recently, I had problems finding a Koi, but I found it!

Messed up the title:
What was the hardest fish for you to catch/find?

 

[abbydoll]

I could never find the Goldfish or the Char. x.x

 

[snapdragon]

I've never been able to catch a coelacanth ;w;

 

[Ursaring]

Any fish a villager asks me to catch for them. >_<

 

[AllisonCypress]

Coelacanth. I could wait for ages in WW and I never caught one. ;-;