Banded archerfish colourations, such as yellow, have been observed. Four to six broad black bars may be present on the dorsal side. The first bar is found anterior to the operculum, the bony plate covering the gills, and the second is found behind the operculum. The third bar is found below the origin of the dorsal fin, the fourth bar below the soft dorsal, and the fifth (if any) on the area between the anal fin and caudal fin (caudal peduncle). These bars become shorter as the fish ages. The lateral line curves upwards at the area between the fourth and ninth
Operculum (gastropod) pentagram-shaped, and is used to dig into the sand to enable the conch to perform a leaping type of locomotion. The structure of the operculum can be described as follows: In 1998 Checa and Jimeneze proposed three types of opercula: There are two basic types of opercula in terms of their material composition: The different shapes of opercula can include ungulate (hooflike), claw-like, or ovate. The type and shape of the operculum is used to help identify and classify related groups (genera) of land operculates, and likewise some marine operculates. The oldest known human depiction of an operculum together with