Variety is the spice of life, as they say!
Usually a tiny bit of powdered spirulina.
Occasionally flaked (vegetarian) fish flake.
Tonight, in this picture, a small piece of Shirakura Shrimp Ball Food (don't ask for any more details, the rest is in Japanese! LOL!) This is the first time I've tried this food with the Opae, but all my other shrimp love it, so I decided to give it a try.
You can tell they LOVE it!