Single post in April Fools' Event

Hey I think there is a slight bug with this event. When searching for fish I've had a image of a Krabby and an Omanyte show up. I clicked them and the message "You found a fish!" does not pop up. When catching actual paper fish it works fine but looking at the number I don't think the Pokemon images counted for anything. Is this also part of the event or is something wrong?