Most of the Opae`ula are very hungry and are eating a lot of Spirulina which is there food. Some of them are on the rocks, why? It seems that they are on the rocks eating algae. I think they already ate the Spirulina, but I'm not too sure about that. Or they are feeding young. Do they have young? Some of them died. They are from the island of Hawaii, they came by air. Some of them are turning around to eat the food. Some are just lifting their heads and eating the Spirulina. Some are big some are small. Yesterday, only one Opae`ula was eating, then it left, but another one came over and started eating it, it seems odd like that? Their behavior is very odd, its not the same. Each one is unique, but odd in their own way. A lot of them are in groups of five or more.