Most dolphins join larger groups to protect themselves
Dolphins have small number of natural predators. The predators of dolphins include sharks, orcas and humans. Dolphins usually defend themselves by joining larger groups.
The killer whale or orcas and sharks are their most powerful predators. They find dolphins appetizing due to their large size as compared to other smaller aquatic species.
Often sharks are termed as the ‘enemies’ of dolphins, but this is mostly due to the hunting instinct of the sharks.
Bottlenose dolphins have a short and thick snout and are in fact, the most renowned species of dolphins. Due to the shape of their snout, it is very easy to assume that they are smiling, but that is the default shape of their mouth. The same also gives them a friendly appearance and attracts humans to them. They can travel at the speed of upto 35 kmph and often travel in “pods” or groups of 10 – 15 dolphins. Bottlenose dolphins are a predator dolphin species that often attack sharks and injure them. Capable of producing a range of sounds, these dolphins use whistling, and squeaking as a means of communicating with each other.
How they defend themselves
Bottlenose dolphins travel in groups to dodge predator attacks. Being in groups also helps them coordinate with each other effectively.
Other than this, bottlenose dolphins are capable of using ‘echolocation’ to locate their prey. In this mechanism, dolphins produce sounds that are unique to each individual and use its echo to differentiate between different objects. This helps them spot approaching threats and flee.
In defense, dolphins can use their powerful snout and stab the the shark where its skin is softer, like the gills.
To attack in defense, it can also use its tail as a weapon.
Although not confirmed, bottlenose dolphins might be capable of attacking using their high-pitched sounds.