Today I made my first observation about the Opae 'ula and I figured out that they like to eat small portions of food. The shrimp eat Spuralina. These shrimp are from the island of Hawaii. The Opae 'ula are only half an inch. These shrimp like to hang around rocks. Also when they eat they eat upside down. When people are around they stick on rock and when there not around they come out.