All my fish love them. Even my Discus
At first my guppies were slow to take this food, but after a couple of introductions they really stir up the water when these krill flakes hit the surface! Also very fun to feed to guppy fry if you really grind it up, you can see their little bellies turn red!
Smells like "good fish food." Can tell it's a quality flake. For some reason my fish aren't big krill fans (they avoided Northfin krill-based pellets, etc) but they do like this flake. It took a several feedings to get them to recognize the flake food as food (they usually eat pellets). Even my picky pearl gourami came around and started eating it. It's a nice addition to their usual staple of Hikari pellet food.