I bought 1000 tiny snickin' shrimp (they are food grade, disease and pathogen free baby shrimp, when grown sold to shushi places and longer than your hand is wide, Panaeus vannamei). They are 1/8 to 1/4 inch long. I divided them among my 4 reefs and larger baby seahorse tank. The tanks are all so happy and it is absolutely HILARIOUS to watch these fat, lazy fish try to catch super fast live food! The tangs look spastic, the foxface is smart and lays on her side and gets them from under the rocks, the angels are clumsy... the maroon clown is the only really good hunter, other than my 6 line wrasses. The cardinal is looking like she may join in any minute. I definitely think that I will be placing a monthly order for these guys. My fish need the exercise and stimulation!