Sea Pigs are cetaceans and are part of the Phocoenidae family. They’re also called porpoises. They are related to whales and dolphins. Mariners and fishermen confused them with dolphins.
The most obvious difference is at the head: porpoises are paying audiences, and dolphins have conical teeth and mouth otherwise. The name originates from medieval Latin. They are divided into six species, found in all the oceans, near the shore.
Together with dolphins and whales are the descendants of hoofed animals that adapted to aquatic life 50 million years ago.
Porpoises are predators and prefer fish, squid and crustaceans.
Although they can descend to depths of 200m they prefer to hunt in shallow waters near the shore.
They are most commonly found in small groups of less than 10 individuals.
Porpoises are smaller animals than dolphins but more robust. They have small heads and rounded with the a short beak. Their teeth are in the form of a spade. The dorsal fin is triangular, while the dolphins are curved.
Some species have small swellings known as tubers on the edge of the dorsal fin. The role of these swelling is unknown.
These animals are the smallest cetaceans, reaching up to 1.5m. The weight differs from species to species, the easiest porpoise belongs to Finless and has 30-45 kg, and the hardest belongs to the Dall species weighing 130-200kg.
Because of their small size, they give off heat in contact with water faster than other cetaceans. The robust shape that makes the animal somewhat more compact can be an adaptation to reduce heat loss.
A thick fat also isolates the body from low temperatures. The small size urges them to eat often, depending on the fat reserves they have.
They can reach speeds of 55 km / h and can be as good acrobats as dolphins. The main threat to seabirds is fishing nets.
They rarely survive in captivity because they are unable to adapt to life in the pool and can not train as easily as dolphins.
They’re a little more difficult. It is known that a group of porpoise saved a man in the name of Van Dyke.
Communicate through a variety of sounds that they emit.
Sea pigs have many similarities with dolphins, but they mate much earlier than dolphins.
Most species are pregnant with one baby each year, and the gestation period lasts about 11 months.
The little ones are breastfed at first by the female.
Porpoises have a longevity between 8 and 10 years of age, but they are known to have reached the age of 20.