![]() The white opaque zone represents a period of slower growth. ![]() The dark translucent zone represents a period of fast growth. This figure shows the growth rings of a sagittal otolith section viewed under reflected light. Lapillus: This type of otolith is involved in the detection of gravitational force and sound (Popper and Lu 2000)ĭifferent species have otoliths of different shapes and sizes and cartilaginous fishes, such as sharks, skates, and rays, have none.Asteriscus: This type of otolith is involved in the detection of sound and the process of hearing.Sagitta: The largest of the 3 pairs of otoliths, sagitta is involved in the detection of sound and the process of hearing, or converting sound waves into electrical signals.There are three types of otoliths, all of which aid fish in balance and hearing: X-ray images of a spotted seatrout show the location and orientation of the otoliths. Otoliths, commonly known as "earstones," are hard, calcium carbonate structures located directly behind the brain of bony fishes. Florida Youth Conservation Centers Network. ![]() ![]()
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