This shy eel is called a Blue Ribbon Eel. As a juvenile it is black. As an adult male, it is blue. As an adult female, it is yellow.
This little shrimp is called a Tiger Shrimp. It is less than 1 inch long.
This bizarre shrimp is called a Tozeuma Shrimp. In this photo, its eye is just below the end of the coral on which it stands.