Marine Wildlife Encyclopedia
Red Abalone Haliotis rufescens
The largest of the abalone species, the red abalone is so called because of the brick-red color of its thick, roughly oval shell. There is an arc of three to five clearly visible holes in the shell, through which it respires and expels waste products. These are filled and replaced with new holes as the abalone increases in size. Sea otters are one of the red abalone’s main predators, along with human divers.