One way sharks communicate with each other is by gaping. Sharks gape as a way to threaten other sharks, or because they are annoyed. Great white sharks are famous for gaping, but they are not the only sharks that communicate like this. Other species, such as Caribbean reef sharks, also enjoy gaping.

Another way sharks communicate with each other is by slapping their tails. This behavior commonly occurs when sharks compete for or defend food.

Sharks bite each other, but not as a sign of aggression. Instead, this strange behavior is part of the courtship ritual. Male sharks bite to attract the attention of females. Females of various shark species often have scars from these encounters, but the bite marks are not as severe as those from feeding.

Sharks sometimes drop their pectoral fins when they feel threatened. As their fins lower, they typically arch their backs and swim in circles. This is how sharks use their body language to say, "Go away".

The translation of the given 'Bahasa' text to 'English' while preserving any HTML tags is: "Sharks arch or bend their backs as a way of saying, \u201cStay away from me\u201d."