When I first put Mario in with Dumbledore, I honestly thought there was going to be some kind of excitement. But, there really wasn't any. He swam over to it, never full on flared but fluffed his fins, blew some bubbles at it and swam away.
Jonah was absolutely terrified of his. I thought I was going to have to take it out. He's very shy to begin with and really only comes out for me, but not for strangers. Now he's fine with it and could really care less.
I have such boring fish, lol.
"So God created the great creatures of the sea and every living and moving thing with which the water teems, according to their kinds...And God saw that it was good."