Bah ha ha! Yes, but I dont like ducks. (They are nasty pooping machines!)
Clown knives are one of my favorite fish! I used to have a pair, (they came with the 55gal tank we bought), until they outgrew it. I had to sell them to a petstore at about 15inches long each. :( They get up to 3ft long so they need a HUGE tank.
(not my pic since I couldnt find the pics of the fish I used to have...)